Appendix D Traffic Impact Analysis - westplainseis.com

HCM Unsignalized Intersection Capacity Analysis
17: Middle Access & Craig Road 2/8/2011
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Volume (veh/h) 32 0 42 0 0 0 48 252 0 0 220 33
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) 35 0 46 0 0 0 52 274 0 0 239 36
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 635 635 257 681 653 274 275 274
vC1, stage 1 conf vol 257 257 378 378
vC2, stage 2 conf vol 378 378 303 275
vCu, unblocked vol 635 635 257 681 653 274 275 274
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 % 94 100 94 100 100 100 96 100
cM capacity (veh/h) 556 533 782 509 516 765 1288 1289
Direction, Lane # EB 1 EB 2 WB 1 NB 1 NB 2 SB 1
Volume Total 35 46 0 52 274 275
Volume Left 35 0 0 52 0 0
Volume Right 0 46 0 0 0 36
cSH 556 782 1700 1288 1700 1700
Volume to Capacity 0.06 0.06 0.00 0.04 0.16 0.16
Queue Length 95th (ft) 5 5 0 3 0 0
Control Delay (s) 11.9 9.9 0.0 7.9 0.0 0.0
Lane LOS B A A A
Approach Delay (s) 10.8 0.0 1.3 0.0
Approach LOS B A
Intersection Summary
Average Delay 1.9
Intersection Capacity Utilization 30.2% ICU Level of Service A
Analysis Period (min) 15
2012 plus Project, Alt. 1, PH1 Synchro 7 - Report
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