Appendix D Traffic Impact Analysis - westplainseis.com

HCM Unsignalized Intersection Capacity Analysis
14: Hwy. 2 & Middle Access 2/14/2011
Movement EBL EBT WBT WBR SBL SBR
Lane Configurations
Volume (veh/h) 341 1829 1603 449 698 144
Sign Control Free Free Stop
Grade 0% 0% 0%
Peak Hour Factor 0.92 0.92 0.92 0.92 0.92 0.92
Hourly flow rate (vph) 371 1988 1742 488 759 157
Pedestrians
Lane Width (ft)
Walking Speed (ft/s)
Percent Blockage
Right turn flare (veh)
Median type TWLTL None
Median storage veh) 2
Upstream signal (ft)
pX, platoon unblocked
vC, conflicting volume 2230 3478 871
vC1, stage 1 conf vol 1742
vC2, stage 2 conf vol 1735
vCu, unblocked vol 2230 3478 871
tC, single (s) 4.1 6.8 6.9
tC, 2 stage (s) 5.8
tF (s) 2.2 3.5 3.3
p0 queue free % 0 0 47
cM capacity (veh/h) 230 0 294
Direction, Lane # EB 1 EB 2 EB 3 WB 1 WB 2 WB 3 SB 1 SB 2
Volume Total 371 994 994 871 871 488 759 157
Volume Left 371 0 0 0 0 0 759 0
Volume Right 0 0 0 0 0 488 0 157
cSH 230 1700 1700 1700 1700 1700 0 294
Volume to Capacity 1.61 0.58 0.58 0.51 0.51 0.29 Err 0.53
Queue Length 95th (ft) 588 0 0 0 0 0 Err 73
Control Delay (s) 333.6 0.0 0.0 0.0 0.0 0.0 Err 30.3
Lane LOS F F D
Approach Delay (s) 52.4 0.0 Err
Approach LOS
F
Intersection Summary
Average Delay
Err
Intersection Capacity Utilization 111.9% ICU Level of Service H
Analysis Period (min) 15
West Plains Development Traffic Impact Analysis
Synchro 7 - Report
2032 Alternative 2 Buildout Page 14