Appendix D Traffic Impact Analysis - westplainseis.com

HCM Unsignalized Intersection Capacity Analysis
1: Hwy. 2 & Craig Road 2/10/2011
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Volume (veh/h) 353 2100 311 109 1845 613 233 115 91 460 101 262
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 2258 334 117 1984 659 251 124 98 495 109 282
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 2643 2592 4580 5895 1129 4266 5570 992
vC1, stage 1 conf vol 3017 3017 2218 2218
vC2, stage 2 conf vol 1562 2877 2048 3352
vCu, unblocked vol 2643 2592 4580 5895 1129 4266 5570 992
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 30 0 0 51 0 0 0
cM capacity (veh/h) 160 168 0 0 200 0 0 246
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 1129 1129 334 117 992 992 659 472 885
Volume Left 380 0 0 0 117 0 0 0 251 495
Volume Right 0 0 0 334 0 0 0 659 98 282
cSH 160 1700 1700 1700 168 1700 1700 1700 0 0
Volume to Capacity 2.37 0.66 0.66 0.20 0.70 0.58 0.58 0.39 Err Err
Queue Length 95th (ft) 798 0 0 0 105 0 0 0 Err Err
Control Delay (s) 682.2 0.0 0.0 0.0 65.4 0.0 0.0 0.0 Err Err
Lane LOS F F F F
Approach Delay (s) 87.1 2.8 Err Err
Approach LOS F F
Intersection Summary
Average Delay
Err
Intersection Capacity Utilization 139.5% ICU Level of Service H
Analysis Period (min) 15
West Plains Development Traffic Impact Analysis
Synchro 7 - Report
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