Appendix D Traffic Impact Analysis - westplainseis.com

HCM Unsignalized Intersection Capacity Analysis
1: Hwy. 2 & Craig Road 2/9/2011
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Volume (veh/h) 93 1383 204 82 1146 154 133 40 66 113 37 72
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) 100 1487 219 88 1232 166 143 43 71 122 40 77
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 1398 1706 2577 3261 744 2445 3315 616
vC1, stage 1 conf vol 1687 1687 1409 1409
vC2, stage 2 conf vol 890 1574 1036 1906
vCu, unblocked vol 1398 1706 2577 3261 744 2445 3315 616
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 % 80 76 0 0 80 0 0 82
cM capacity (veh/h) 490 373 35 28 360 13 5 436
Direction, Lane # EB 1 EB 2 EB 3 EB 4 WB 1 WB 2 WB 3 WB 4 NB 1 SB 1
Volume Total 100 744 744 219 88 616 616 166 257 239
Volume Left 100 0 0 0 88 0 0 0 143 122
Volume Right 0 0 0 219 0 0 0 166 71 77
cSH 490 1700 1700 1700 373 1700 1700 1700 45 14
Volume to Capacity 0.20 0.44 0.44 0.13 0.24 0.36 0.36 0.10 5.75 17.15
Queue Length 95th (ft) 19 0 0 0 23 0 0 0 Err Err
Control Delay (s) 14.2 0.0 0.0 0.0 17.6 0.0 0.0 0.0 Err Err
Lane LOS B C F F
Approach Delay (s) 0.8 1.0 Err Err
Approach LOS F F
Intersection Summary
Average Delay 1309.2
Intersection Capacity Utilization 70.2% ICU Level of Service C
Analysis Period (min) 15
2012 plus Project, Alt. 3, Buildout Synchro 7 - Report
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