Appendix D Traffic Impact Analysis - westplainseis.com

HCM Unsignalized Intersection Capacity Analysis
15: Hwy. 2 & East Access 2/8/2011
Movement EBL EBT WBT WBR SBL SBR
Lane Configurations
Volume (veh/h) 0 2033 1610 111 0 42
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 2210 1750 121 0 46
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 1871 2855 875
vC1, stage 1 conf vol 1750
vC2, stage 2 conf vol 1105
vCu, unblocked vol 1871 2855 875
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 84
cM capacity (veh/h) 318 110 292
Direction, Lane # EB 1 EB 2 WB 1 WB 2 WB 3 SB 1
Volume Total 1105 1105 875 875 121 46
Volume Left 0 0 0 0 0 0
Volume Right 0 0 0 0 121 46
cSH 1700 1700 1700 1700 1700 292
Volume to Capacity 0.65 0.65 0.51 0.51 0.07 0.16
Queue Length 95th (ft) 0 0 0 0 0 14
Control Delay (s) 0.0 0.0 0.0 0.0 0.0 19.6
Lane LOS
C
Approach Delay (s) 0.0 0.0 19.6
Approach LOS
C
Intersection Summary
Average Delay 0.2
Intersection Capacity Utilization 59.5% ICU Level of Service B
Analysis Period (min) 15
2015 plus Project, Alt. 1, PH2 Synchro 7 - Report
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