Appendix D Traffic Impact Analysis - westplainseis.com

HCM Unsignalized Intersection Capacity Analysis
10: SR-902 & Craig 1/25/2011
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Volume (veh/h) 53 284 9 14 284 25 5 50 5 45 82 169
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) 59 316 10 16 316 28 6 56 6 50 91 188
Pedestrians
Lane Width (ft)
Walking Speed (ft/s)
Percent Blockage
Right turn flare (veh) 4
Median type None None
Median storage veh)
Upstream signal (ft)
pX, platoon unblocked
vC, conflicting volume 343 326 924 813 321 827 804 329
vC1, stage 1 conf vol
vC2, stage 2 conf vol
vCu, unblocked vol 343 326 924 813 321 827 804 329
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 96 81 99 79 69 74
cM capacity (veh/h) 1221 1245 134 294 720 236 299 714
Direction, Lane # EB 1 EB 2 WB 1 WB 2 NB 1 SB 1
Volume Total 59 326 16 343 67 329
Volume Left 59 0 16 0 6 50
Volume Right 0 10 0 28 6 188
cSH 1221 1700 1245 1700 280 645
Volume to Capacity 0.05 0.19 0.01 0.20 0.24 0.51
Queue Length 95th (ft) 4 0 1 0 23 73
Control Delay (s) 8.1 0.0 7.9 0.0 21.8 20.0
Lane LOS A A C C
Approach Delay (s) 1.2 0.3 21.8 20.0
Approach LOS C C
Intersection Summary
Average Delay 7.6
Intersection Capacity Utilization 43.3% ICU Level of Service A
Analysis Period (min) 15
Description: Add Southbound Right Turn Lane (100')
2019 PM Peak Hour Background Conditions-Mitigation Synchro 7 - Report
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