Appendix D Traffic Impact Analysis - westplainseis.com

HCM Unsignalized Intersection Capacity Analysis
1: Hwy. 2 & Craig Road 2/14/2011
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Volume (veh/h) 353 1854 223 109 1582 502 140 41 91 365 37 262
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) 380 1994 240 117 1701 540 151 44 98 392 40 282
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 2241 2233 4139 5228 997 3811 4928 851
vC1, stage 1 conf vol 2753 2753 1935 1935
vC2, stage 2 conf vol 1387 2475 1876 2992
vCu, unblocked vol 2241 2233 4139 5228 997 3811 4928 851
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 % 0 50 0 0 60 0 0 8
cM capacity (veh/h) 231 232 0 0 244 0 0 306
Direction, Lane # EB 1 EB 2 EB 3 EB 4 WB 1 WB 2 WB 3 WB 4 NB 1 SB 1
Volume Total 380 997 997 240 117 851 851 540 292 714
Volume Left 380 0 0 0 117 0 0 0 151 392
Volume Right 0 0 0 240 0 0 0 540 98 282
cSH 231 1700 1700 1700 232 1700 1700 1700 0 0
Volume to Capacity 1.64 0.59 0.59 0.14 0.50 0.50 0.50 0.32 Err Err
Queue Length 95th (ft) 611 0 0 0 65 0 0 0 Err Err
Control Delay (s) 346.3 0.0 0.0 0.0 35.3 0.0 0.0 0.0 Err Err
Lane LOS F E F F
Approach Delay (s) 50.3 1.8 Err Err
Approach LOS F F
Intersection Summary
Average Delay
Err
Intersection Capacity Utilization 122.0% ICU Level of Service H
Analysis Period (min) 15
West Plains Development Traffic Impact Analysis 5:00 pm 2/8/2011 2032 Alternative 3 Buildout
Synchro 7 - Report
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