Appendix D Traffic Impact Analysis - westplainseis.com

HCM Unsignalized Intersection Capacity Analysis
18: South Access & Craig Road 2/14/2011
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Volume (veh/h) 42 0 69 0 0 0 65 787 0 0 631 34
Sign Control Stop Stop Free Free
Grade 0% 0% 0% 0%
Peak Hour Factor 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92
Hourly flow rate (vph) 46 0 75 0 0 0 71 855 0 0 686 37
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 1701 1701 704 1758 1720 855 723 855
vC1, stage 1 conf vol 704 704 997 997
vC2, stage 2 conf vol 997 997 761 723
vCu, unblocked vol 1701 1701 704 1758 1720 855 723 855
tC, single (s) 7.1 6.5 6.2 7.1 6.5 6.2 4.1 4.1
tC, 2 stage (s) 6.1 5.5 6.1 5.5
tF (s) 3.5 4.0 3.3 3.5 4.0 3.3 2.2 2.2
p0 queue free % 80 100 83 100 100 100 92 100
cM capacity (veh/h) 231 251 437 189 237 358 879 785
Direction, Lane # EB 1 EB 2 WB 1 NB 1 NB 2 SB 1 SB 2
Volume Total 46 75 0 71 855 0 723
Volume Left 46 0 0 71 0 0 0
Volume Right 0 75 0 0 0 0 37
cSH 231 437 1700 879 1700 1700 1700
Volume to Capacity 0.20 0.17 0.00 0.08 0.50 0.00 0.43
Queue Length 95th (ft) 18 15 0 7 0 0 0
Control Delay (s) 24.4 14.9 0.0 9.5 0.0 0.0 0.0
Lane LOS C B A A
Approach Delay (s) 18.5 0.0 0.7 0.0
Approach LOS C A
Intersection Summary
Average Delay 1.6
Intersection Capacity Utilization 59.0% ICU Level of Service B
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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