Appendix D Traffic Impact Analysis - westplainseis.com

HCM Unsignalized Intersection Capacity Analysis
9: Thorpe & Craig 1/18/2011
Movement EBT EBR WBL WBT NBL NBR
Lane Configurations
Volume (veh/h) 2 3 173 3 3 118
Sign Control Free Free Stop
Grade 0% 0% 0%
Peak Hour Factor 0.83 0.83 0.83 0.83 0.83 0.83
Hourly flow rate (vph) 2 4 208 4 4 142
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 6 425 4
vC1, stage 1 conf vol
vC2, stage 2 conf vol
vCu, unblocked vol 6 425 4
tC, single (s) 4.1 6.4 6.2
tC, 2 stage (s)
tF (s) 2.2 3.5 3.3
p0 queue free % 87 99 87
cM capacity (veh/h) 1628 510 1076
Direction, Lane # EB 1 WB 1 NB 1
Volume Total 6 212 146
Volume Left 0 208 4
Volume Right 4 0 142
cSH 1700 1628 1047
Volume to Capacity 0.00 0.13 0.14
Queue Length 95th (ft) 0 11 12
Control Delay (s) 0.0 7.4 9.0
Lane LOS A A
Approach Delay (s) 0.0 7.4 9.0
Approach LOS
A
Intersection Summary
Average Delay 7.9
Intersection Capacity Utilization 30.5% ICU Level of Service A
Analysis Period (min) 15
Existing PM Peak Hour Conditions
Synchro 7 - Report
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