Appendix D Traffic Impact Analysis - westplainseis.com

HCM Unsignalized Intersection Capacity Analysis
10: SR-902 & Craig 2/8/2011
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Volume (veh/h) 70 284 9 14 284 93 5 108 5 118 145 190
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) 78 316 10 16 316 103 6 120 6 131 161 211
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 419 326 1114 926 321 935 879 367
vC1, stage 1 conf vol
vC2, stage 2 conf vol
vCu, unblocked vol 419 326 1114 926 321 935 879 367
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 % 93 99 91 51 99 8 39 69
cM capacity (veh/h) 1146 1245 62 247 720 143 264 680
Direction, Lane # EB 1 EB 2 WB 1 WB 2 NB 1 SB 1
Volume Total 78 326 16 419 131 503
Volume Left 78 0 16 0 6 131
Volume Right 0 10 0 103 6 211
cSH 1146 1700 1245 1700 225 274
Volume to Capacity 0.07 0.19 0.01 0.25 0.58 1.84
Queue Length 95th (ft) 5 0 1 0 82 854
Control Delay (s) 8.4 0.0 7.9 0.0 41.1 421.4
Lane LOS A A E F
Approach Delay (s) 1.6 0.3 41.1 421.4
Approach LOS E F
Intersection Summary
Average Delay 148.3
Intersection Capacity Utilization 66.9% ICU Level of Service C
Analysis Period (min) 15
2012 plus Project, Alt. 2, Buildout Synchro 7 - Report
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