Appendix D Traffic Impact Analysis - westplainseis.com

HCM Unsignalized Intersection Capacity Analysis
2: Hwy. 2 & Lundstrom St. 2/8/2011
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Volume (veh/h) 38 2264 30 19 2143 33 15 3 21 13 4 26
Sign Control Free Free Stop Stop
Grade 0% 0% 0% 0%
Peak Hour Factor 0.97 0.97 0.97 0.97 0.97 0.97 0.97 0.97 0.97 0.97 0.97 0.97
Hourly flow rate (vph) 39 2334 31 20 2209 34 15 3 22 13 4 27
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 2243 2365 3601 4710 1182 3534 4709 1122
vC1, stage 1 conf vol 2428 2428 2265 2265
vC2, stage 2 conf vol 1173 2282 1269 2443
vCu, unblocked vol 2243 2365 3601 4710 1182 3534 4709 1122
tC, single (s) 4.1 4.1 7.5 6.5 6.9 7.5 6.5 6.9
tC, 2 stage (s) 6.5 5.5 6.5 5.5
tF (s) 2.2 2.2 3.5 4.0 3.3 3.5 4.0 3.3
p0 queue free % 83 90 40 87 88 61 85 87
cM capacity (veh/h) 227 206 26 24 185 35 28 203
Direction, Lane # EB 1 EB 2 EB 3 WB 1 WB 2 WB 3 NB 1 SB 1
Volume Total 39 1556 809 20 1473 770 40 44
Volume Left 39 0 0 20 0 0 15 13
Volume Right 0 0 31 0 0 34 22 27
cSH 227 1700 1700 206 1700 1700 48 66
Volume to Capacity 0.17 0.92 0.48 0.10 0.87 0.45 0.84 0.67
Queue Length 95th (ft) 15 0 0 8 0 0 86 73
Control Delay (s) 24.1 0.0 0.0 24.3 0.0 0.0 217.2 132.9
Lane LOS C C F F
Approach Delay (s) 0.4 0.2 217.2 132.9
Approach LOS F F
Intersection Summary
Average Delay 3.4
Intersection Capacity Utilization 73.5% ICU Level of Service D
Analysis Period (min) 15
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