Appendix D Traffic Impact Analysis - westplainseis.com

HCM Unsignalized Intersection Capacity Analysis
10: SR-902 & Craig 2/9/2011
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Volume (veh/h) 63 284 9 14 284 69 5 87 5 100 129 184
Sign Control Free Free Stop Stop
Grade 0% 0% 0% 0%
Peak Hour Factor 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90
Hourly flow rate (vph) 70 316 10 16 316 77 6 97 6 111 143 204
Pedestrians
Lane Width (ft)
Walking Speed (ft/s)
Percent Blockage
Right turn flare (veh)
Median type None None
Median storage veh)
Upstream signal (ft)
pX, platoon unblocked
vC, conflicting volume 392 326 1083 884 321 894 851 354
vC1, stage 1 conf vol
vC2, stage 2 conf vol
vCu, unblocked vol 392 326 1083 884 321 894 851 354
tC, single (s) 4.1 4.1 7.1 6.5 6.2 7.1 6.5 6.2
tC, 2 stage (s)
tF (s) 2.2 2.2 3.5 4.0 3.3 3.5 4.0 3.3
p0 queue free % 94 99 93 63 99 37 48 70
cM capacity (veh/h) 1172 1245 77 264 720 177 277 692
Direction, Lane # EB 1 EB 2 WB 1 WB 2 NB 1 SB 1
Volume Total 70 326 16 392 108 459
Volume Left 70 0 16 0 6 111
Volume Right 0 10 0 77 6 204
cSH 1172 1700 1245 1700 242 319
Volume to Capacity 0.06 0.19 0.01 0.23 0.45 1.44
Queue Length 95th (ft) 5 0 1 0 53 614
Control Delay (s) 8.3 0.0 7.9 0.0 31.3 246.3
Lane LOS A A D F
Approach Delay (s) 1.5 0.3 31.3 246.3
Approach LOS D F
Intersection Summary
Average Delay 85.5
Intersection Capacity Utilization 62.9% ICU Level of Service B
Analysis Period (min) 15
2012 plus Project, Alt. 3, Buildout Synchro 7 - Report
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