Appendix D Traffic Impact Analysis - westplainseis.com

HCM Unsignalized Intersection Capacity Analysis
16: North Access & Craig Road 2/10/2011
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Volume (veh/h) 208 0 47 0 0 0 37 806 0 0 636 186
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) 226 0 51 0 0 0 40 876 0 0 691 202
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 1648 1648 691 1699 1850 876 893 876
vC1, stage 1 conf vol 691 691 957 957
vC2, stage 2 conf vol 957 957 742 893
vCu, unblocked vol 1648 1648 691 1699 1850 876 893 876
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 % 8 100 89 100 100 100 95 100
cM capacity (veh/h) 247 267 444 219 231 348 759 771
Direction, Lane # EB 1 EB 2 WB 1 NB 1 NB 2 SB 1 SB 2
Volume Total 226 51 0 40 876 691 202
Volume Left 226 0 0 40 0 0 0
Volume Right 0 51 0 0 0 0 202
cSH 247 444 1700 759 1700 1700 1700
Volume to Capacity 0.92 0.11 0.00 0.05 0.52 0.41 0.12
Queue Length 95th (ft) 200 10 0 4 0 0 0
Control Delay (s) 80.4 14.2 0.0 10.0 0.0 0.0 0.0
Lane LOS F B A B
Approach Delay (s) 68.2 0.0 0.4 0.0
Approach LOS F A
Intersection Summary
Average Delay 9.3
Intersection Capacity Utilization 60.6% ICU Level of Service B
Analysis Period (min) 15
Description: SB Right Turn Lane (100')
West Plains Development Traffic Impact Analysis
Synchro 7 - Report
2032 Alternative 1 Buildout Page 16