Question

4 NB L, NB T/R 225, 215 veh/h Timing stage Allowed movements Analysis flow rate Saturation flow rate SB L, SB T/R 255, 235 veh/h EB T/R, WB T/R 975, 1030 veh/h EB L, WB L 245, 230 veh/h 3350, 3400 veb/h 1725, 1750 veh/h 1700,1750 veh/h n flow rate 1750. 1725 vehh 1750, 1725 ve

the intersection has a four-timing-state signal with the movements allowed in each timing stage and corresponding analysis and saturation flow rates shown in the table.

a) calculate the minimum cycle length and effective green time for each timing stage (balancing v/c for the critical lane groups). assume the lsot time is 4 seconds per timing stage and a criticsl intersection v/c of 0.9 is desired.

b) calculate the intersection control delay and level of service, assumjng pre-times isolated intersection.

Answer 1

14 1030 3 400 21.5 -4 14,90 3400 0, 2.3

Co -) 0 14 O-구2.3 0123 3 ニ 0.148 0キ2.3

lo4 6 2 45 104.693 tvy.ta3ㅡㅡㅡㅡ jo4.bas lo4 b23

16.143 IDy.b43 56.03 시Wh 0.0