Traffic Impact Analysis Executive Summary

TRAFFIC IMPACT 
 
 
Transportation approves this TIA contingent on the following assumptions
- School staffing numbers remain as stated in this submittal
-Staggered student arrivals will occur as stated
-School will not increase enrollment beyond 100 students
Received
4/24/2025

Revised Traffic Impact Analysis 
 
2 
Sahuaro Glen Academy – 65th Avenue/Alice Avenue 
Table of Contents 
Executive Summary ____________________________________________________ 4 
Project Description _____________________________________________________ 5 
Study Methodology _____________________________________________________ 5 
Existing Conditions _____________________________________________________ 8 
Existing Traffic Data __________________________________________________ 10 
Access _______________________________________________________________ 10 
Trip Generation ______________________________________________________ 13 
Trip Distribution & Assignment _________________________________________ 13 
Existing Traffic Operations _____________________________________________ 16 
Future Traffic Operations Without Project ________________________________ 17 
Future Traffic Operations With Project___________________________________ 19 
Turn Lane Analysis____________________________________________________ 21 
Crash Analysis ________________________________________________________ 23 
Conclusion ___________________________________________________________ 25 
 
Table of Figures 
Figure 1 – Vicinity Map _________________________________________________ 6 
Figure 2 – Site Plan _____________________________________________________ 7 
Figure 3 – Existing Lane Configurations and Traffic Control __________________ 9 
Figure 4 – Existing Weekday Peak Hour Traffic Volumes ____________________ 11 
Figure 5 – Baseline Access Point and Intersection Configuration Assumptions __ 12 
Figure 6 – Weekday Peak Hour Trip Distribution __________________________ 14 
Figure 7 –Weekday Peak Hour Trip Assignment ___________________________ 15 
Figure 8 – 2026 Weekday Peak Hour Traffic Volumes Without Project ________ 18 
Figure 9 - 2026 Weekday Peak Hour Traffic Volumes With Project ___________ 20 
Figure 10 – Proposed Lane Configurations and Traffic Control _______________ 26

Revised Traffic Impact Analysis 
 
3 
Sahuaro Glen Academy – 65th Avenue/Alice Avenue 
List of Tables 
Table 1 – Site Generated Trips __________________________________________ 13 
Table 2 – Level of Service Criteria – Un-signalized Intersections ______________ 16 
Table 3 – Existing Weekday Peak Hour Levels of Service ____________________ 17 
Table 4 – 2026 Weekday Peak Hour Levels of Service Without Project _________ 19 
Table 5 – 2026 Weekday Peak Hour Levels of Service With Project ___________ 21 
Table 6 – MCDOT Left Turn Lane Warrant at Driveways ___________________ 22 
Table 7 – MCDOT Right Turn Lane Warrant at Driveways __________________ 22 
Table 8 – Left Turn Lane Warrant Evaluation at Driveways _________________ 23 
Table 9 – Right Turn Lane Warrant Evaluation at Driveways ________________ 23 
Table 10 – Crash Analysis at Alice Avenue/67th Avenue ______________________ 23 
Table 11 – Crash Analysis at Alice Avenue/65th Avenue ______________________ 24 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Appendix  
Traffic Counts  
Capacity Calculations 
Crash Analysis 
Comment Resolution 
 
Prepared By: 
Andrew Smigielski, PE, PTOE, PTP  
Shane Gutknecht, PE

Revised Traffic Impact Analysis 
 
4 
Sahuaro Glen Academy – 65th Avenue/Alice Avenue 
SAHUARO GLEN ACADEMY 
65TH AVENUE/ALICE AVENUE 
REVISED TRAFFIC IMPACT ANALYSIS 
 
Executive Summary 
The purpose of this traffic study is to evaluate the current and future transportation system 
within the project study area surrounding the site without and with the proposed. 
 
Existing Traffic Operations 
All of the study intersections currently operate at an adequate Level of Service (LOS) 
during the weekday AM and PM peak hours.  
 
Future Traffic Operations Without Project 
The study intersections are all expected to continue to operate at an adequate LOS in 2026 
without traffic from the project during the weekday AM and PM peak hours. 
 
Future Traffic Operations With Project 
All of the study intersections are expected to continue to operate at an adequate LOS in 
2026 without and with traffic from the project during the weekday AM and PM peak hours. 
 
Turn Lane Analysis 
Inbound turn lanes are not expected to be warranted at GSL East Driveway or GSL South 
Driveway. 
 
Crash Analysis 
Crash history for the existing study intersections was obtained from ADOT from 1 
January 2019 to 31 December 2023. 
 
Thirty (30) crashes (six with injury) were reported at the intersection of Alice Avenue/67th 
Avenue within the five-year study period. Collisions involving left turns accounted for 
50% of the total crashes, this is likely due to left turning vehicles misjudging the speed of 
oncoming traffic on 67th Avenue and accepting gaps in traffic too small to make the 
maneuver. Notably, a significant number (43%) of the vehicle incidents occurred in the 
year 2020. In the years 2023, 2022, 2021, and 2019 there were crashes per year at this 
intersection. The spike in crashes in 2020 may be attributed to irregular traffic patterns 
during the COVID-19 pandemic.  
 
Four (4) crashes were reported at the intersection of Alice Avenue/65th Avenue.  
 
No crashes were reported at the intersections of GSL East Driveway/Alice Avenue, GSL 
North Driveway/65th Avenue, GSL South Driveway/65th Avenue.  
 
Due to the limited number of crashes at the study intersections within the study period, 
there is no observable crash pattern for the area.

Revised Traffic Impact Analysis 
 
5 
Sahuaro Glen Academy – 65th Avenue/Alice Avenue 
SAHUARO GLEN ACADEMY 
65TH AVENUE/ALICE AVENUE 
REVISED TRAFFIC IMPACT ANALYSIS 
 
Project Description 
 
Bezos Academy is proposing a new Pre-School on the southwest corner of 65th 
Avenue/Alice Avenue in Glendale, Arizona. The vicinity of the project is shown in Figure 
1. The site will be located as shown in Figure 2. The proposed development will be a 100 
student Pre-School, served by five existing intersections. 
 
The purpose of this traffic impact analysis is to: 
 
• Evaluate the current and future operational characteristics of the adjacent roadway 
network surrounding the project site. 
• Estimate the traffic generation associated with the project and assign that traffic to the 
existing roadway system. 
• Analyze future traffic operations at five existing intersections. 
• Determine the need for auxiliary (left and right turn) lanes at the driveways that will 
serve the project site.  
• Perform a crash analysis to identify any specific crash trends within the study area. 
 
The author of this report is a registered Professional Engineer (Civil) in the State of Arizona 
having specific expertise and experience in the preparation of traffic impact analyses. 
 
 
Study Methodology 
 
In order to analyze and evaluate the potential traffic impacts of the proposed development, 
the following tasks were undertaken: 
 
• Field observation of the proposed site and surrounding area was conducted to evaluate 
the existing physical and operational characteristics of the adjacent roadway network. 
• Traffic volumes generated by the proposed site were estimated based site specific 
information provided by the operator of the site.  
• Calculated site traffic was distributed based on existing traffic patterns and assigned to 
the primary roadways within the project study limits. 
• Capacity analyses were performed for the existing conditions and future conditions 
without and with the project based on an opening year of 2026 a using methodology 
presented in the 2022 Highway Capacity Manual (HCM 7). 
• The need for auxiliary turn lanes at the study driveways were evaluated based on 
Maricopa County Department of Transportation (MCDOT) guidelines. 
• Crash records were obtained from the Arizona Department of Transportation (ADOT) 
database to identify any specific crash trends within the study area.

Revised Traffic Impact Analysis 
 
6 
Sahuaro Glen Academy – 65th Avenue/Alice Avenue 
Figure 1 – Vicinity Map

EXIT
EXIT
SAHUARO GLENN
(6) ACADEMY  
PARKING,
RESTRIPE 
PARKING 
SPACES
9'X18' EACH
NORTH
OUTDOOR PLAY AREA 
3,750 SF
SLUMP BLOCK FENCE 
PER DETAILS 2,3,4,&
5/G1.00
EXIT
EXIT
EXIT
EXIT
EXIT
VAN
ACCESS 
1
2
3
4
5
6
7
8
(E) FH
(E) FH
G1.00
8
EXIT
EXIT
EXISTING TRANSFORMER
9
10
11
12
14
15
16
17
13
18
19
20
GATE
G1.00
3
G1.00
5
EXISTING 
SITE FENCE
STAFF PATIO
UTILITY ENCLOSURE
UTILITY ENCLOSURE
W ALICE AVE
N 65TH AVE
(12) 
EXISTING 
PARKING 
-NO 
CHANGE 
PROPOSED
5' WIDE CONCRETE 
SIDEWALK, TYP
CONCRETE SIDEWALK, TYP
PROTECT EXISTING TREE
PROTECT EXISTING TREES
PROTECT EXISTING TREE
POST AND PANEL SIGN, NIC
G1.00
4
2
EXCAVATE 6"
145'-0"
(E) FH
EXISTING SITE GATE
TO EXIT (TO REMAIN OPEN)
PROTECT EXISTING TREES
NSSP
N
N
N
N
N
G1.00
7
4'-0"
EXISTING    RIGHT - OF - WAY
SHADE STRUCTURE 
10'X10'
SHADE STRUCTURE 
10'X10'
STORAGE SHED
120SFT ,  HT < 6'
PER IFC APPENDIX D, D103.4 DEAD 
ENDS , DEAD-END FIRE APPARATUS 
ACCESS ROADS WITHIN 150 DO NOT 
REQUIRE A TURNAROUND 
FIRE APPARATUS ACCESS ROAD <150 FEET
125'-0"
HOSE PULL DISTANCE
98'-8 1/2"
PROPERTY LINE
PROPERTY LINE
HOSE PULL 268' DISTANCE BETWEEN TWO FIRE ACCESS POINTS 
<300' (150'+150' HOSE PULL LENGTHS)  
EXISTING SIDE WALK FLUSH 
WITH DRIVE. NO CURB
COVERED 
PARKING TO BE 
MAINTAINED
(1) BIKE RACK - COLOR TO 
MATCH EXISTING BUILDING
ACCESSIBLE PATH TO 
PARKING: TEACHER WALKS 
KIDS ON CROSSWALK 
NORTH
G1.00.
8
G1.00.
3
G1.00.
4
G1.00.
2
G1.00.
7
G1.02
3
G1.02
2
G1.02
5
PARENT/GUARDIAN 
DROP OFF AND PICK UP: 
SEE NARRATIVE FOR 
OPERATIONS.
ASPHALT DRIVEWAY
28'-0"
DROP OFF
EXISTING SITE GATE
TO ENTER (TO REMAIN OPEN)
DRIVE AISLE CENTER LINE 
STRIPING
5'-0"
PROPOSED 
DRIVE LINE
STAFF ESCORTS 
STUDENTS TO 
CLASSROOM
CAR EXITS
CAR STOPS HERE 
AND KID GETS 
OUT HERE INTO 
TEACHER'S CARE
PARKING 
FOR 
TEACHERS 
AND 
PARENTS
PARKING 
FOR 
TEACHERS 
ONLY
PROJECT ADDRESS:
SAHUARO GLENN
6511 WEST ALICE AVENUE
GLENDALE, AZ 85302
   
OWNER: 
DAY 1 ACADEMIES
3040 78TH AVENUE SOUTHEAST, SUITE 1042
MERCER ISLAND, WA 98040
CONTACT: WOLFGANG HORN, PHONE 925-922-2268
PROPERTY OWNER:
GLENCROFT CENTER FOR MODERN AGING
8611 N 67TH AVE, GLENDALE, AZ 85302
GLENDALE, AZ 85302
CONTACT: JOHN THORNHAUER, PHONE 623-939-9475
   
ARCHITECT OF RECORD:
BASSETTI ARCHITECTS
71 COLUMBIA ST., #501
SEATTLE, WA 98104
CONTACT: SUSAN CONWAY, 206-340-9500
   
TAX PARCEL NO:
143-19-001M; 143-19-003A; 143-19-001L
   
LEGAL DESCRIPTION:
143-19-003A
W 50F SE4 NW4 EX S 40F & EX RD P/D 15171-148 & EX ANY PT LY SLY OF FOL DESC 
LN COM W4 COR SEC 31 TH N 88D 32M E 1220.8F N 384F S 88D 9M W 543F TH N 1D 
8M W 281.60F TO TPOB SD LN TH N 88D 51M E 549.87F TO TERM SD LN
143-19-001M
SE4 NW4 SEC 31 DAF FR NW COR SE4 NW4 SD SEC E 50F TPOB TH E 65. 96F TH S 
1320F M/L TH W 63.32F TH N 1320F TPOB EX S 40F & EX S 5X5 TRI IN SE COR & EX 
RD P/D 15171-148 & EX PT LY SLY OF FOL DESC LN COM W4 COR SEC 31 TH N 88D 
32M E 1220.8F N 384F S 88D 9M W 543F N 1D 8M W 281.60F TO TPOB SD LN TH N 88D 
51M E 549.87F TO TERM SD LN
143-19-001L
N2 SW4 NW4 SEC 31 AKA N2 LOT 2 EX W 45F & EX N 30F & EX 10F X 10F TRI IN NW 
COR TH/OF & EX COM W4 COR SEC TH N ALG W LN SEC 935.08F TH N 88D 51M E 
142.34F TH N 88D 37M E 384.19F TO TPOB TH CONT N 88D 37M E 142F TH S 1D 12M E 
213.58F TH S 88D 51M W 142F TH N 1D 12M W 213.01F TO TPOB & EX P/D 15491-0629
JURISDICTION:
CITY OF GLENDALE, AZ
   
FIRE DISTRICT:
GLENDALE FIRE DEPARTMENT   
SEWER DISTRICT:
GLENDALE SEWER SERVICES DEPARTMENT
WATER DISTRICT:
GLENDALE WATER SERVICES DEPARTMENT
   
CODES:
2018 IBC (International Building Code)
2018 IEBC (International Existing Building Code)
2018 IRC (International Residential Code)
2018 IMC (International Mechanical Code)
2018 IPC (International Plumbing Code)
2018 IECC (International Energy Code)
2018 IFGC (International Fuel Code)
2018 IFC (International Fire Code)
2017 NEC (National Electric Code)
Americans With Disability Act Accessibility Guidelines
Arizonans with Disabilities Act
2018 Americans with Disabilities Act Standards for Accessible Design
2018 IPMC (International Property Maintenance Code)
City of Glendale Revised Sound Attenuation Standards
Fair Housing Accessibility Guidelines
   
PROPOSED USE:
PRIVATE SCHOOL WITHOUT DORMITORIES  
   
ZONING:
R-4, MULTIPLE RESIDENCE
OCCUPANCY GROUP:
E - EDUCATIONAL - PERMITED CONDITIONAL USE
BUILDING AREA :
7,719 SF
N 59 TH AVE
N 67 TH AVE
W OLIVE AVE
W NORTHERN AVE
60
17
107
SITE LOCATION
NEW RIVER
NORTH
N 65 TH AVE
W ALICE AVE
EXISTING ACCESSIBLE PATH
CONCRETE SIDEWALK, TYP
BROOM FINISH, TOOLED CONTROL 
JOINT EVERY 5'-0"
(E) SEWER LINE
(E) WATER LINE
(E) FIRE HYDRANT (FH)
(E) LUMINAR
NO STANDING/STOPPING/PARKING SIGN
PER CITY OF GLENDALE TRANSPORTATION 
REFER DETAIL #SS-109
R7-101, R7-101L OR R7-101R
NSSP
ACCESSIBLE PATH
PROPERTY LINE
FIRE APPARATUS ACCESS ROAD
4
GATE-B-2
323119 - STL PICKET FENCE
042000 - MASONRY SLUMP BLOCK FENCE
G1.00
9
TYP
323119 - STL PICKET GATE
CJ
8'-0"
7'-9"
CJ
CJ
LEVEL 1
0"
4
GATE-B-1
6
G1.00
CJ
G1.00
3
TYP
SLUMP BLOCK MASONRY FENCE TO MATCH EXISTING SITE FENCE
8'-0"
7'-11 1/2"
LEVEL 1
0"
SECTION 033053 -
MISCELLANEOUS
CAST-IN-PLACE CONCRETE
3'-0"
323119 - FENCE POST 
MOUNTED ONE COURSE 
BELOW TOP OF WALL
323119 - STEEL PICKET FENCE
3'-4"
EQUAL TO (8) COURSES SB-CMU
2'-8"
EQUAL TO (4) COURSES SB-CMU
1'-4"
CIP FOOTING
9 1/4"
CAULKING AND 
BACKER-ROD
042000 - SLUMP WALL 
CONCRETE MASONRY UNITS
CUT BLOCK AROUND FENCE 
POST, LEAVE 1/4" VOID 
SPACE AROUND POST
042000 #5 @ 32" OC VERT
042000 #5 @ 48" OC HORIZ
033053 #5 DOWELS @16" OC 
(ALT. HOOKS)
#4 @ 48" OC TOP
(3) #4 CONT BOT.
EQ
8" MON
EQ
042000 #5 @ TOP
POST BASE PL, WELDED TO 
POST, 5X10X3/8 PL, (4) 3X1/2 
WEDGE ANCHORS
072500 - CAULKING AND BACKER ROD
323119 - STL PICKET 4X4X1/4 POST
GROUT FILLED 
CUT CMU TOP BLK
323119 - STL BASE PLATE
ACCESS PARKING SYMBOL 
PER #SS-205,WHITE
10'-0"
5'-0"
5'-0"
ACCESS PARKING SIGN REFER DETAIL #SS-105
#SS-131 FOR SIGN SQUARE POST
SECTION 321723 - 4" WIDE 
PAVEMENT MARKINGS, 
45DEG ANGLE 2' OC
4" WIDE WHITE PARKING STRIPE
WHEEL STOP
20'-0"
FLUSH CURB FROM PARKING TO 
SIDEWALK 
EXISTING TRANSFORMER
TRENCH PER ELECTRICAL DRAWINGS 
CONCRETE PATH, CONTROL JOINT 5' TYP
ELECTRICAL SERVICE LOCATION, 
SEE ELECTRICAL DRAWINGS
EXISTING BUILDING 
CONTROL JOINT TYP
G1.02
1
LEVEL 1
0"
CJ
CJ
CJ
323119 - STEEL PICKET
042000 - SLUMP BLOCK WALL
2'-8"
8'-0"
8'-0"
8'-0"
8'-0"
8'-0"
8'-0"
8'-0"
8'-0"
8'-0"
8'-0"
8'-0"
8'-0"
8'-0"
8'-0"
8'-0"
8'-0"
8'-0"
2'-6"
CJ
CJ
CJ
CJ
CJ
CJ
CJ
CJ
CJ
CJ
CJ
CJ
CJ
CJ
CJ
LEVEL 1
0"
ACCESS PARKING SYMBOL 
PER #SS-205,WHITE
5'-0"
11'-0"
5'-0"
SECTION 321723 - 4" WIDE 
PAVEMENT MARKINGS, 
45DEG ANGLE 2' OC
VAN ACCESSIBLE SIGN
REFER DETAIL #SS-105
&SS-131 FOR SIGN SQUARE POST 
4" WIDE WHITE 
PARKING STRIPE
WHEEL STOP
VAN SPACE
FLUSH CURB FROM PARKING TO 
SIDEWALK 
20'-0"
3'-10"
1'-6"
a. Fire Department access and water supply requirements shall be in place prior to 
combustible materials being brought on site 
b. Pursuant to Chapter 32.5 of the Glendale City Code, all new and existing utilities 
within or contiguous to this site shall be placed underground. 
c. 
All utility boxes, vaults and backflow prevention devices shall be painted to match 
the building and screened from public view by a masonry wall or a round-topped 
wire mesh enclosure, painted to match the adjacent wall. 
d. Sight distance requirements of COG detail G-447 (Local Streets) or G-448 
(Arterial and Collector Streets) are met for all driveways and streets. 
e. Streetlights installed by the developer may be required for construction plan 
approval. 
f. 
On-site lighting will be placed so as to direct the light away from adjacent 
residential uses and must not exceed one-foot candle at the property line. The 
height of the parking lot lights within 150’ of residential use to be 15’.  High 
Pressure Sodium (HPS) lighting required adjacent to residence. 
g. On-site lighting shall meet outdoor Light Control Ordinance. 
h. Maximum noise level 55 decibels (normal speaking voice) at property line. 
i. 
Convenience uses shall be subject to a separate Citizen 
Participation and Conditional Use Permit Process. 
j. 
The property owner is responsible for maintaining landscaping in all  public rights-
of-way adjacent to the project. 
EXIT/ENTRANCE
EXIT/ENTRANCE
EXIT/ENTRANCE
ENTRANCE 
ONLY
EXIT 
ONLY
EXIT 
ONLY
71 Columbia Street, Suite 500
Seattle, Washington 98104
T (206) 340 9500
ISSUE DATE:
JOB NO:
#
DATE
Jurisdiction Stamp Area
ONE INCH
AT FULL SIZE
www.bassettiarch.com
4/21/2025 3:46:32 PM
ARCHITECTURAL
SITE PLAN
2314
GLENDALE -
SAHUARO
GLENN
BEZOS ACADEMY
APRIL 21, 2025
G1.00
SR24-0217 CUP
6511 WEST ALICE AVENUE
GLENDALE, AZ 85302
STRUCTURAL ENGINEER
Coughlin Porter Lundeen
801 Second Avenue Suite 900
Seattle, WA 98104
T (206) 343 0460
MECHANICAL ENGINEER
Hargis Engineers, Inc.
1201 3rd Avenue, Suite 600
Seattle, WA 98101
T (206) 448 3376
ELECTRICAL ENGINEER
Hargis Engineers, Inc.
1201 3rd Avenue, Suite 600
Seattle, WA 98101
T (206) 448 3376
1" = 30'-0"
1
SITE PLAN
PROJECT DATA
VICINITY MAP
SITE PLAN LEGEND
0'
30'
15'
1/4" = 1'-0"
3
72" NORTH GATE
1/4" = 1'-0"
5
72" SOUTH GATE
1 1/2" = 1'-0"
6
SITE WALL SECTION (TYP)
1 1/2" = 1'-0"
9
SITE WALL CONTROL JOINT (CJ) - TYP
1" = 10'-0"
8
ADA PARKING
1/16" = 1'-0"
10
SIDEWALK REPAIR
ACCESS PARKING SYMBOL
1/4" = 1'-0"
4
FENCE EAST ELEVATION
1/4" = 1'-0"
2
FENCE NORTH
1" = 10'-0"
7
ADA PARKING -VAN ACCESSIBLE
1
1
1
1
1
1
GENERAL SITE PLAN NOTES
2
REVISIONS
1
CUP RESPONSES
12/16/24
2
CUP RESPONSES
2/21/25
3
CUP RESPONSES
4/11/25
4
CUP RESPONSES
4/21/25
EXISTING PARKING EXITS / ENTRANCES
3
3
4
4
4
4

Revised Traffic Impact Analysis 
 
8 
Sahuaro Glen Academy – 65th Avenue/Alice Avenue 
Existing Conditions 
 
The proposed project involves the redevelopment of an existing building at the Glencroft 
Senior Living (GSL) facility on the southwest corner of 65th Avenue/Alice Avenue in 
Glendale, Arizona. 
 
67th Avenue is a north/south aligned arterial roadway that provides two lanes in each 
direction of travel separated by a two-way center left turn lane. Curb, gutter, and sidewalk 
facilities are available on both sides of the roadway. The posted speed limit on 67th Avenue 
is 40 miles per hour (mph).  
 
Alice Avenue is an east/west aligned collector street and 65th Avenue is a north/south 
aligned collector street. Both roads provide a single lane in each direction of travel. Curb, 
gutter, and sidewalk facilities are present on both sides of the roadway. The posted speed 
limit is 25 mph. 
 
The intersection of Alice Avenue/67th Avenue is a three-leg unsignalized intersection. 
Westbound traffic approaching the intersection is STOP controlled. While pavement 
markings do not exist to delineate separate westbound left and westbound right turn lanes 
at the intersection, operationally it behaves in the same way. The east leg of the intersection 
is roughly 40 feet wide and when provided with that much pavement vehicles attempting 
to turn left and right tend to naturally separate into two queues. A separate westbound left 
and westbound right turn lane were modeled in analyses of this report. Northbound traffic 
is provided with a through lane and a shared through/right turn lane while southbound 
traffic makes use of a two-way center left turn lane and two through lanes.  
 
Alice Avenue/65th Avenue forms a four-leg ALL WAY STOP controlled intersection. All 
approaches to the intersection are provided with a shared left/through/right turn lane.  
 
The Glencroft Senior Living (GSL) community is accessed by multiple driveways on the 
south side of Alice Avenue and west side of 65th Avenue within the study area. This report 
will focus on three primary driveways that will facilitate access to the proposed project. 
The easternmost driveway on Alice Avenue, GSL East Driveway, is a full-access driveway 
located approximately 175 feet west of 65th Avenue. An exit only driveway (GSL North 
Driveway) and an entrance only driveway (GSL South Driveway) are located on the west 
side of 65th Avenue, approximately 325 feet and 650 feet south of Alice Avenue, 
respectively. Both GLS North Driveway and GSL South Driveway are gated. 
 
The study intersection locations, lane configurations, and intersection control are shown in 
Figure 3.

Revised Traffic Impact Analysis 
 
9 
Sahuaro Glen Academy – 65th Avenue/Alice Avenue 
Figure 3 – Existing Lane Configurations and Traffic Control

Revised Traffic Impact Analysis 
 
10 
Sahuaro Glen Academy – 65th Avenue/Alice Avenue 
Existing Traffic Data 
 
In order to form a basis for analysis of the project impacts, weekday AM and PM peak hour 
turning movement counts were conducted at the intersections of Alice Avenue/67th 
Avenue, Alice Avenue/65th Avenue, GSL East Driveway, GSL North Driveway, GSL 
South Driveway.  
 
The weekday turning movement counts were conducted from 7:00 AM to 9:00 AM and 
4:00 PM to 6:00 PM. All traffic counts were collected in March 2024 while school was in 
session. The results of the traffic counts are shown in Figure 4. Complete traffic count data 
can be found in the Appendix. 
 
 
Access 
 
The proposed project does not include the construction of new access points. Instead, it 
will utilize GSL East Driveway as the primary entrance to the proposed project, with the 
GSL North Driveway and GSL South Driveway designated as the main child drop-off and 
pick-up accesses. 
 
GSL East Driveway will provide access to a parking area utilized by teachers, deliveries, 
and other non-student pick-up/drop-off traffic. Vehicles that enter at GSL East Driveway 
must also exit at GSL East Driveway as there will be no onsite connectivity to other 
driveways.  
 
Vehicles entering the site to drop-off or pick-up a student will do so via GSL South 
Driveway. From there, parents will take an immediate right turn, and continue northbound, 
where teachers, or other traffic monitors, will be waiting to help children unload and escort 
them to their classroom. Drivers will remain in their vehicles and then exit the site after 
their children have been unloaded. Exiting vehicles will continue north and exit via GSL 
North Driveway. GSL North Driveway will be exit only and GSL South Driveway will be 
enter only during the peak hours and child drop-off and pick-up times.  
 
Figure 5 shows the locations, geometry and spacing for the study intersections that will 
also serve as a baseline of analysis in 2026 with Sahuaro Glen Academy.

Revised Traffic Impact Analysis 
 
11 
Sahuaro Glen Academy – 65th Avenue/Alice Avenue 
Figure 4 – Existing Weekday Peak Hour Traffic Volumes

Revised Traffic Impact Analysis 
 
12 
Sahuaro Glen Academy – 65th Avenue/Alice Avenue 
Figure 5 – Baseline Access Point and Intersection Configuration Assumptions

Revised Traffic Impact Analysis 
 
13 
Sahuaro Glen Academy – 65th Avenue/Alice Avenue 
Trip Generation 
 
Traffic volumes generated by the proposed site were estimated based site specific 
information provided by the operator of the site. The following data and assumptions were 
utilized:  
 
• 100 students will be dropped off during the weekday AM peak hour. All of the 
vehicles associated with drop-off also exit during the weekday AM peak hour. 
• 50 students will be picked up from aftercare during the weekday PM peak hour. All 
of the vehicles associated with aftercare pick-up also exit during the weekday PM 
peak hour. 
• A carpool factor of 0.85 was utilized to account for siblings and students that do 
not arrive in separate vehicles. 
• In order to provide a conservative analysis it was assumed that the school’s 16 staff 
members would all arrive during the weekday AM peak hour and would all exit 
during the weekday PM peak hour. However, it is expected that most or all staff 
members will arrive/depart before and after the open hours of the academy (i.e. 
outside of the weekday AM/PM peak hours). 
• 5 miscellaneous vehicles (vendors, maintenance, etc.) enter and exit during both 
the weekday AM and PM peak hours. 
 
The result is the expected weekday trip generation for the project as shown in Table 1.  
 
Table 1 – Site Generated Trips  
 
 
 
 
Trip Distribution & Assignment 
 
Trip distribution for the project was based on existing traffic volume patterns near the 
proposed site. Figure 6 shows the weekday trip distribution for the project as a percentage 
of net new primary trips. 
 
Figure 7 shows the assignment of the new site generated trips to the project intersections 
within the study area.  
 
Day Care Center
(LUC 565)
Average Daily, Inbound (vtpd)
392
Average Daily, Outbound (vtpd)
392
Total Daily
784
AM Peak Hour, Inbound (vtph)
106
AM Peak Hour, Outbound (vtph)
90
Total AM Peak
196
PM Peak Hour, Inbound (vtph)
48
PM Peak Hour, Outbound (vtph)
64
Total PM Peak
112
vtpd - vehicle trips per day, vtph - vehicle trips per hour
Time Period

Revised Traffic Impact Analysis 
 
14 
Sahuaro Glen Academy – 65th Avenue/Alice Avenue 
Figure 6 – Weekday Peak Hour Trip Distribution

Revised Traffic Impact Analysis 
 
15 
Sahuaro Glen Academy – 65th Avenue/Alice Avenue 
Figure 7 –Weekday Peak Hour Trip Assignment

Revised Traffic Impact Analysis 
 
16 
Sahuaro Glen Academy – 65th Avenue/Alice Avenue 
Existing Traffic Operations 
 
Analysis of current intersection operations was conducted for the weekday AM and PM 
peak hours using the nationally accepted methodology set forth in the Highway Capacity 
Manual, Transportation Research Board, 2022 (HCM 7). The computer software Synchro 
12 was utilized to calculate the levels of service for individual movements and approaches. 
 
LOS is a qualitative measure of the traffic operations at an intersection or on a roadway 
segment. Level of service is ranked from LOS A, which signifies little or no congestion 
and is the highest rank, to LOS F, which signifies congestion and jam conditions. LOS D 
is typically considered adequate operation at signalized and un-signalized intersections in 
developed areas. 
 
At un-signalized intersections, level of service is predicted/calculated for those 
movements, which must either stop for or yield to oncoming traffic and is based on average 
control delay for the particular movement. Control delay is the portion of total delay 
attributed to traffic control measures such as stop signs and traffic signals. The criteria for 
level of service at un-signalized intersections are shown in Table 2. 
 
Table 2 – Level of Service Criteria – Un-signalized Intersections 
 
Level-of-Service 
Delay 
A 
< 10 seconds/vehicle 
B 
> 10 and < 15 seconds/vehicle 
C 
> 15 and < 25 seconds/vehicle 
D 
> 25 and < 35 seconds/vehicle 
E 
> 35 and < 50 seconds/vehicle 
F 
> 50 seconds/vehicle 
 
 
Table 3 shows the existing levels of service that were calculated for the study intersections. 
Complete capacity calculations are included in the Appendix.  
 
As shown in Table 3, all the study intersections currently operate at an adequate LOS during 
the weekday AM and PM peak hours.

Revised Traffic Impact Analysis 
 
17 
Sahuaro Glen Academy – 65th Avenue/Alice Avenue 
Table 3 – Existing Weekday Peak Hour Levels of Service 
 
 
 
 
Future Traffic Operations Without Project 
 
In order to assess the impacts of the project on future traffic operations, traffic projections 
were made for the opening year of 2026. A review of Maricopa County historical traffic 
data in the vicinity of the project showed increasing and decreasing traffic volumes in the 
area. A 2% annual compounded traffic growth rate was used to estimate the future 2026 
weekday peak hour traffic volumes without the project, as shown in Figure 8.  
 
As with the current volumes, levels of service were calculated for each of the intersections 
in the study area for 2026 without the project. Intersection levels of service for 2026 
without the project are shown in Tables 4. Complete capacity calculations are included in 
the Appendix. 
 
As shown in Table 4, all the study intersections are expected to continue to operate at an 
adequate LOS in 2026 without traffic from the project during the weekday AM and PM 
peak hours. 
 
 
LOS
Delay
LOS
Delay
Unsignalized Intersections
Alice Avenue/67th Avenue
Westbound Left
C
18.8
C
20.0
Westbound Right
B
11.4
B
11.4
Southbound Left
A
9.6
A
9.6
GSL East Driveway/Alice Avenue
Westbound Left/Through
A
0.0
A
0.0
Northbound Left/Right
A
0.0
A
0.0
Alice Avenue/65th Avenue
Eastbound Left/Through/Right
A
8.0
A
7.9
Westbound Left/Through/Right
A
7.6
A
7.7
Northbound Left/Through/Right
A
7.6
A
7.6
Southbound Left/Through/Right
A
7.7
A
7.8
GSL North Driveway/65th Avenue
Eastbound Left/Right
A
0.0
A
9.1
GSL South Driveway/65th Avenue
Northbound Left/Through
A
7.4
A
7.3
Delay - seconds per vehicle
PM Peak
Intersection
AM Peak

Revised Traffic Impact Analysis 
 
18 
Sahuaro Glen Academy – 65th Avenue/Alice Avenue 
Figure 8 – 2026 Weekday Peak Hour Traffic Volumes Without Project

Revised Traffic Impact Analysis 
 
19 
Sahuaro Glen Academy – 65th Avenue/Alice Avenue 
Table 4 – 2026 Weekday Peak Hour Levels of Service Without Project 
 
 
 
 
Future Traffic Operations With Project 
 
In order to assess the impacts of the project on future traffic operations, levels of service 
were calculated for each project intersection in 2026 with the project. Weekday peak hour 
traffic volumes for 2026 without the project were combined with the estimated trips 
generated by the project to yield weekday peak hour traffic volumes with the project as 
shown in Figure 9. Weekday intersection levels of service for 2026 with the project were 
then calculated as shown in Table 5. Complete capacity calculations are included in the 
Appendix. 
 
As shown in Table 5, all the study intersections are expected to continue to operate at an 
acceptable LOS in 2026 without and with traffic from the project during the weekday AM 
and PM peak hours. 
 
 
 
 
LOS
Delay
LOS
Delay
Unsignalized Intersections
Alice Avenue/67th Avenue
Westbound Left
C
19.2
C
20.3
Westbound Right
B
11.6
B
11.5
Southbound Left
A
9.7
A
9.7
GSL East Driveway/Alice Avenue
Westbound Left/Through
A
0.0
A
0.0
Northbound Left/Right
A
0.0
A
0.0
Alice Avenue/65th Avenue
Eastbound Left/Through/Right
A
7.9
A
7.8
Westbound Left/Through/Right
A
7.5
A
7.6
Northbound Left/Through/Right
A
7.6
A
7.5
Southbound Left/Through/Right
A
7.6
A
7.7
GSL North Driveway/65th Avenue
Eastbound Left/Right
A
0.0
A
9.1
GSL South Driveway/65th Avenue
Northbound Left/Through
A
7.3
A
7.3
Delay - seconds per vehicle
Intersection
AM Peak
PM Peak

Revised Traffic Impact Analysis 
 
20 
Sahuaro Glen Academy – 65th Avenue/Alice Avenue 
Figure 9 - 2026 Weekday Peak Hour Traffic Volumes With Project

Revised Traffic Impact Analysis 
 
21 
Sahuaro Glen Academy – 65th Avenue/Alice Avenue 
Table 5 – 2026 Weekday Peak Hour Levels of Service With Project 
 
 
 
 
Turn Lane Analysis 
 
A key element of this analysis is to determine if left and right turn lanes are required at the 
driveways providing access to the proposed project site. The City of Glendale utilizes 
Maricopa County Department of Transportation turn lane warrant criteria. Turn lane 
warrant criteria from the MCDOT Roadway Design Manual updated March 2024 
(MCDOT RDM) are shown in Tables 6 and 7.  
 
Tables 8 and 9 show the locations that were evaluated for left and right turn lanes based 
on MCDOT guidelines and traffic volumes in 2026 with the project. 
 
As shown in Table 8 and 9, inbound turn lanes at GSL East Driveway and GSL South 
Driveway are not warranted. 
 
LOS
Delay
LOS
Delay
LOS
Delay
LOS
Delay
Unsignalized Intersections
Alice Avenue/67th Avenue
Westbound Left
C
19.2
C
20.3
C
20.3
C
21.0
Westbound Right
B
11.6
B
11.5
B
11.7
B
11.6
Southbound Left
A
9.7
A
9.7
A
9.8
A
9.8
GSL East Driveway/Alice Avenue
Westbound Left/Through
A
0.0
A
0.0
A
7.6
A
7.4
Northbound Left/Right
A
0.0
A
0.0
A
9.2
A
9.0
Alice Avenue/65th Avenue
Eastbound Left/Through/Right
A
7.9
A
7.8
A
8.3
A
8.1
Westbound Left/Through/Right
A
7.5
A
7.6
A
8.2
A
7.9
Northbound Left/Through/Right
A
7.6
A
7.5
A
8.3
A
7.9
Southbound Left/Through/Right
A
7.6
A
7.7
A
8.1
A
8.0
GSL North Driveway/65th Avenue
Eastbound Left/Right
A
0.0
A
9.1
B
10.3
A
9.5
GSL South Driveway/65th Avenue
Northbound Left/Through
A
7.3
A
7.3
A
7.7
A
7.5
Delay - seconds per vehicle
Intersection
AM Peak
PM Peak
AM Peak
PM Peak
2025 Without Project
2025 With Project

Revised Traffic Impact Analysis 
 
22 
Sahuaro Glen Academy – 65th Avenue/Alice Avenue 
Table 6 – MCDOT Left Turn Lane Warrant at Driveways 
 
 
 
Table 7 – MCDOT Right Turn Lane Warrant at Driveways

Revised Traffic Impact Analysis 
 
23 
Sahuaro Glen Academy – 65th Avenue/Alice Avenue 
Table 8 – Left Turn Lane Warrant Evaluation at Driveways 
 
 
 
 
Table 9 – Right Turn Lane Warrant Evaluation at Driveways 
 
 
 
 
Crash Analysis 
 
Crash history for the existing study intersections was obtained from ADOT from 1 January 
2019 to 31 December 2023. The results of the crash analysis at the intersections of Alice 
Avenue/67th Avenue, Alice Avenue/65th Avenue, GSL East Driveway, GSL North 
Driveway, GSL South Driveway are shown in Tables 10 and 11. A summary of the crash 
data can be found in the Appendix. 
 
Table 10 – Crash Analysis at Alice Avenue/67th Avenue 
 
 
 
 
 
AM
63
21
30
PM
74
4
30
AM
56
25
30
PM
45
13
30
vph - vehicles per hour, mph - miles per hour 
Direction
Left Turn 
Treatment 
Warranted?
Intersection
Advancing 
Traffic 
Volume 
(vph)
Minimum 
Left-Turn 
Volume 
Criteria (vph)
Westbound
1
25
No
GSL East Driveway/Alice Avenue
Peak 
Hour
Left-Turn 
Volume 
(vph)
# of 
Through 
Lanes per 
Direction
Posted 
Speed 
(mph)
GSL South Driveway/65th Avenue
Northbound
1
25
No
AM
114
4
N/A*
PM
91
1
N/A*
AM
60
56
N/A*
PM
65
30
N/A*
vph - vehicles per hour, mph - miles per hour 
*Advancing through traffic volumes are not high enough to warrant a turn lane. 
Advancing 
Traffic 
Volume 
Right-
Turn 
Volume 
Posted 
Speed 
(mph)
Peak 
Hour
Minimum 
Right-Turn 
Volume 
Right Turn 
Treatment 
Warranted?
GSL East Driveway/Alice Avenue
Eastbound
1
25
No
Intersection
Direction
# of 
Through 
Lanes per 
GSL South Driveway/65th Avenue
Southbound
1
25
No
Angle
Left Turn
Rear-End
Sideswipe
Single 
Vehicle
Head On
Other
2019
1
2
0
1
0
0
0
0
0
4
2020
1
6
4
2
0
0
0
0
1
13
2021
1
2
0
0
0
0
0
0
1
3
2022
0
1
1
0
0
0
0
0
1
2
2023
1
4
1
1
1
0
0
0
3
8
5-Year Total
4
15
6
4
1
0
0
0
6
30
Year
Crash Type
Fatal
Injury
Crash 
Totals

Revised Traffic Impact Analysis 
 
24 
Sahuaro Glen Academy – 65th Avenue/Alice Avenue 
Table 11 – Crash Analysis at Alice Avenue/65th Avenue 
 
 
 
As shown in Table 10, thirty (30) crashes (six with injury) were reported at the intersection 
of Alice Avenue/67th Avenue within the five-year study period. Collisions involving left 
turns accounted for 50% of the total crashes, this is likely due to left turning vehicles 
misjudging the speed of oncoming traffic on 67th Avenue and accepting gaps in traffic too 
small to make the maneuver. Notably, a significant number (43%) of the vehicle incidents 
occurred in the year 2020. In the years 2023, 2022, 2021, and 2019 there were crashes per 
year at this intersection. The spike in crashes in 2020 may be attributed to irregular traffic 
patterns during the COVID-19 pandemic.  
 
As shown in Table 11, four (4) crashes were reported at the intersection of Alice 
Avenue/65th Avenue. 
 
Crashes were not reported at the intersections of GSL East Driveway/Alice Avenue, GSL 
North Driveway/65th Avenue, GSL South Driveway/65th Avenue.  
 
Due to the limited number of crashes at the study intersections within the study period, 
there is no observable crash pattern for the area. 
 
It should be noted that this crash summary only includes crashes where a police officer was 
contacted and wrote a report, otherwise, there is no record of the incident. It is possible that 
other minor crashes occurred in the area where the Police Department was not contacted, 
and no official record of these crashes exists. 
 
 
 
 
Angle
Left Turn
Rear-End
Sideswipe
Single 
Vehicle
Head On
Other
2019
1
2
0
0
0
0
0
0
0
3
2020
0
1
0
0
0
0
0
0
0
1
2021
0
0
0
0
0
0
0
0
0
0
2022
0
0
0
0
0
0
0
0
0
0
2023
0
0
0
0
0
0
0
0
0
0
5-Year Total
1
3
0
0
0
0
0
0
0
4
Year
Crash Type
Fatal
Injury
Crash 
Totals

Revised Traffic Impact Analysis 
 
25 
Sahuaro Glen Academy – 65th Avenue/Alice Avenue 
Conclusion 
 
When fully completed, the proposed Sahuaro Glen Academy is predicted to generate an 
additional 784 vehicle trips per day (vtpd) on weekdays to the adjacent street system from 
the new project site. Fifty percent of these new trips (392 vehicle trips) will be into the 
project and fifty percent will be out of the project.  
 
All the study intersections currently operate at an adequate LOS during the weekday AM 
and PM peak hours and are anticipated to continue operating at an adequate LOS during 
the weekday AM and PM peak hours in 2026 without and with the proposed project.  
 
Inbound turn lanes are not expected to be warranted at GSL East Driveway or GSL South 
Driveway. 
 
Thirty (30) crashes (six with injury) were reported at the intersection of Alice Avenue/67th 
Avenue within the five-year study period. Collisions involving left turns accounted for 
50% of the total crashes, this is likely due to left turning vehicles misjudging the speed of 
oncoming traffic on 67th Avenue and accepting gaps in traffic too small to make the 
maneuver. Notably, a significant number (43%) of the vehicle incidents occurred in the 
year 2020. In the years 2023, 2022, 2021, and 2019 there were crashes per year at this 
intersection. The spike in crashes in 2020 may be attributed to irregular traffic patterns 
during the COVID-19 pandemic.  
 
Four (4) crashes were reported at the intersection of Alice Avenue/65th Avenue.  
 
No crashes were reported at the intersections of GSL East Driveway/Alice Avenue, GSL 
North Driveway/65th Avenue, GSL South Driveway/65th Avenue.  
 
Due to the limited number of crashes at the study intersections within the study period, 
there is no observable crash pattern for the area. 
 
Proposed lane configurations and traffic control are shown in Figure 10. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
P:\projects 2024\24021 - sahuaro glenn daycare (glendale)\traffic analysis\report\rev final\sga tia SEALED 240331.docx