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 1924 244 109 1678 561 170 80 91 412 68 262
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 2069 262 117 1804 603 183 86 98 443 73 282
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 2408 2331 4283 5470 1034 3973 5129 902
vC1, stage 1 conf vol 2828 2828 2039 2039
vC2, stage 2 conf vol 1455 2642 1934 3090
vCu, unblocked vol 2408 2331 4283 5470 1034 3973 5129 902
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 45 0 0 58 0 0 0
cM capacity (veh/h) 198 213 0 0 231 0 0 283
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 1034 1034 262 117 902 902 603 367 798
Volume Left 380 0 0 0 117 0 0 0 183 443
Volume Right 0 0 0 262 0 0 0 603 98 282
cSH 198 1700 1700 1700 213 1700 1700 1700 0 0
Volume to Capacity 1.91 0.61 0.61 0.15 0.55 0.53 0.53 0.35 Err Err
Queue Length 95th (ft) 694 0 0 0 74 0 0 0 Err Err
Control Delay (s) 469.4 0.0 0.0 0.0 40.9 0.0 0.0 0.0 Err Err
Lane LOS F E F F
Approach Delay (s) 65.7 1.9 Err Err
Approach LOS F F
Intersection Summary
Average Delay
Err
Intersection Capacity Utilization 131.2% ICU Level of Service H
Analysis Period (min) 15
West Plains Development Traffic Impact Analysis
Synchro 7 - Report
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