Appendix D Traffic Impact Analysis - westplainseis.com

HCM Unsignalized Intersection Capacity Analysis
17: Middle Access & Craig Road 2/14/2011
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Volume (veh/h) 16 0 19 0 0 0 19 810 0 0 622 12
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) 17 0 21 0 0 0 21 880 0 0 676 13
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 1604 1604 683 1625 1611 880 689 880
vC1, stage 1 conf vol 683 683 922 922
vC2, stage 2 conf vol 922 922 703 689
vCu, unblocked vol 1604 1604 683 1625 1611 880 689 880
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 % 93 100 95 100 100 100 98 100
cM capacity (veh/h) 262 282 449 250 277 346 905 768
Direction, Lane # EB 1 EB 2 WB 1 NB 1 NB 2 SB 1
Volume Total 17 21 0 21 880 689
Volume Left 17 0 0 21 0 0
Volume Right 0 21 0 0 0 13
cSH 262 449 1700 905 1700 1700
Volume to Capacity 0.07 0.05 0.00 0.02 0.52 0.41
Queue Length 95th (ft) 5 4 0 2 0 0
Control Delay (s) 19.7 13.4 0.0 9.1 0.0 0.0
Lane LOS C B A A
Approach Delay (s) 16.3 0.0 0.2 0.0
Approach LOS C A
Intersection Summary
Average Delay 0.5
Intersection Capacity Utilization 52.6% ICU Level of Service A
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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