Attachment D - Methods Comparision.pdf

ATTACHMENT D 
Kinematic Equation  
  (25 MPH)
Kinematic Equation    
(Speed Limit - 5 MPH)
Extended Kinematic 
Equation
NCHRP - City of 
Phoenix
ITE 2020 - City of 
Phoenix
Posted Speed Limit 
(MPH)
PHOENIX Left-Turn
Yellow Change 
Interval (sec)
NCHRP Left-Turn
Yellow Change 
Interval (sec)
ITE 2020 Left-Turn
Yellow Change 
Interval (sec)
Yellow Change 
Interval Difference 
(sec)
Yellow Change 
Interval Difference 
(sec)
25
3.0
3.0
3.3
0.0
+ 0.3
30
3.0
3.0
4.0
0.0
+ 1.0
35
3.0
3.3
4.7
+ 0.3
+ 1.7
40
3.0
3.6
5.5
+ 0.6
+ 2.5
45
3.0
4.0
6.2
+ 1.0
+ 3.2
50
3.0
4.4
6.9
+ 1.4
+ 3.9
55
3.0
4.7
7.0
+ 1.7
+ 4.0