Appendix D Traffic Impact Analysis - westplainseis.com

HCM Unsignalized Intersection Capacity Analysis
1: Hwy. 2 & Craig Road 1/18/2011
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Volume (veh/h) 87 1094 87 82 907 90 36 2 66 61 2 65
Sign Control Free Free Stop Stop
Grade 0% 0% 0% 0%
Peak Hour Factor 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93
Hourly flow rate (vph) 94 1176 94 88 975 97 39 2 71 66 2 70
Pedestrians
Lane Width (ft)
Walking Speed (ft/s)
Percent Blockage
Right turn flare (veh)
Median type TWLTL TWLTL
Median storage veh) 2 2
Upstream signal (ft)
pX, platoon unblocked
vC, conflicting volume 1072 1270 2098 2612 588 2047 2657 536
vC1, stage 1 conf vol 1363 1363 1200 1200
vC2, stage 2 conf vol 735 1248 847 1457
vCu, unblocked vol 1072 1270 2098 2612 588 2047 2657 536
tC, single (s) 4.1 4.1 7.5 6.5 6.9 7.5 6.5 6.9
tC, 2 stage (s) 6.5 5.5 6.5 5.5
tF (s) 2.2 2.2 3.5 4.0 3.3 3.5 4.0 3.3
p0 queue free % 86 84 63 98 84 39 97 86
cM capacity (veh/h) 652 548 105 94 455 107 72 492
Direction, Lane # EB 1 EB 2 EB 3 EB 4 WB 1 WB 2 WB 3 NB 1 SB 1
Volume Total 94 588 588 94 88 650 422 112 138
Volume Left 94 0 0 0 88 0 0 39 66
Volume Right 0 0 0 94 0 0 97 71 70
cSH 652 1700 1700 1700 548 1700 1700 204 175
Volume to Capacity 0.14 0.35 0.35 0.06 0.16 0.38 0.25 0.55 0.78
Queue Length 95th (ft) 12 0 0 0 14 0 0 73 130
Control Delay (s) 11.4 0.0 0.0 0.0 12.8 0.0 0.0 42.2 75.0
Lane LOS B B E F
Approach Delay (s) 0.8 1.0 42.2 75.0
Approach LOS E F
Intersection Summary
Average Delay 6.2
Intersection Capacity Utilization 56.0% ICU Level of Service B
Analysis Period (min) 15
2012 PM Peak Hour Background Conditions Synchro 7 - Report
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