Traffic Signal Timing Question

Would you like to give me an idea how to figure out the Through Vehicle Equivalents for Left Turning Vehicles, E LT? I don't know how to get the volume number, for example, EB volume 35 to Equivalent Table 4.0?

An example is as follows:

Computation of Through Vehicle Equivalent Volumes for Signal Timing

Approach Movement Volume Equivalent tables Volume

EB L 35 4 140

T 610 1 610

R 70 1.32 92

WB L 25 5.15 129

T 500 1 500

R 50 1.32 66

EB L 220 1.05 231

T 700 1 700

R 185 1.32 244

EB L 250 1.05 263

T 800 1 800

R 175 1.32 231

Reference Table

Opposing Flow Vo (veh/h) Number of Opposing Lanes No

1 2 3

0 1.1 1.1 1.1

200 2.5 2 1.8

400 5 3 2.5

600 10 5 4

800 13 8 6

1000 15 13 10

1200 15 15 15

E LT for all protected left turns = 1.05

Through Vehicles Equivalent for Right Turning Vehicles, E RT

Ped Volume In Conflicting Crosswalk (peds/h) Equivalent

None 1.18

Low (50) 1.21

Moderate (200) 1.32

High (400) 1.52

Extreme (800) 2.14