Appendix D Traffic Impact Analysis - westplainseis.com

HCM Unsignalized Intersection Capacity Analysis
13: Hwy. 2 & West Access 2/14/2011
Movement EBL EBT WBT WBR SBL SBR
Lane Configurations
Volume (veh/h) 0 2170 1555 191 0 190
Sign Control Free Free Stop
Grade 0% 0% 0%
Peak Hour Factor 0.92 0.92 0.92 0.92 0.92 0.92
Hourly flow rate (vph) 0 2359 1690 208 0 207
Pedestrians
Lane Width (ft)
Walking Speed (ft/s)
Percent Blockage
Right turn flare (veh)
Median type None TWLTL
Median storage veh) 2
Upstream signal (ft)
pX, platoon unblocked
vC, conflicting volume 1898 2870 845
vC1, stage 1 conf vol 1690
vC2, stage 2 conf vol 1179
vCu, unblocked vol 1898 2870 845
tC, single (s) 4.1 6.8 6.9
tC, 2 stage (s) 5.8
tF (s) 2.2 3.5 3.3
p0 queue free % 100 100 33
cM capacity (veh/h) 310 114 306
Direction, Lane # EB 1 EB 2 WB 1 WB 2 WB 3 SB 1
Volume Total 1179 1179 845 845 208 207
Volume Left 0 0 0 0 0 0
Volume Right 0 0 0 0 208 207
cSH 1700 1700 1700 1700 1700 306
Volume to Capacity 0.69 0.69 0.50 0.50 0.12 0.67
Queue Length 95th (ft) 0 0 0 0 0 114
Control Delay (s) 0.0 0.0 0.0 0.0 0.0 38.0
Lane LOS
E
Approach Delay (s) 0.0 0.0 38.0
Approach LOS
E
Intersection Summary
Average Delay 1.8
Intersection Capacity Utilization 63.3% ICU Level of Service B
Analysis Period (min) 15
West Plains Development Traffic Impact Analysis
Synchro 7 - Report
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