Modeling Traffic Function Reliability of Signalized Intersections with Control Delay

Table 3

Signal control intersections service level.

Level of service	1	2	3	4
Control delay (s/vel^−1)	<30	30 ∼ 50	50 ∼ 60	≥60
rate	<0.6	0.6 ∼ 0.8	0.8 ∼ 0.9	≥0.9
Queue length (m)	<30	30 ∼ 80	80 ∼ 100	≥100