Appendix D Traffic Impact Analysis - westplainseis.com

HCM Unsignalized Intersection Capacity Analysis
10: SR-902 & Craig 1/18/2011
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Volume (veh/h) 52 284 9 14 284 24 5 49 5 44 81 169
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) 58 316 10 16 316 27 6 54 6 49 90 188
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 342 326 1016 809 321 824 801 329
vC1, stage 1 conf vol
vC2, stage 2 conf vol
vCu, unblocked vol 342 326 1016 809 321 824 801 329
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 % 95 99 95 82 99 80 70 74
cM capacity (veh/h) 1222 1245 117 296 720 239 300 715
Direction, Lane # EB 1 EB 2 WB 1 WB 2 NB 1 SB 1
Volume Total 58 326 16 342 66 327
Volume Left 58 0 16 0 6 49
Volume Right 0 10 0 27 6 188
cSH 1222 1700 1245 1700 274 426
Volume to Capacity 0.05 0.19 0.01 0.20 0.24 0.77
Queue Length 95th (ft) 4 0 1 0 23 162
Control Delay (s) 8.1 0.0 7.9 0.0 22.2 36.4
Lane LOS A A C E
Approach Delay (s) 1.2 0.3 22.2 36.4
Approach LOS C E
Intersection Summary
Average Delay 12.3
Intersection Capacity Utilization 53.5% ICU Level of Service A
Analysis Period (min) 15
Description: Add Southbound Right Turn Lane (100')
2015 PM Peak Hour Background Conditions Synchro 7 - Report
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