Appendix D Traffic Impact Analysis - westplainseis.com

HCM Unsignalized Intersection Capacity Analysis
2: Hwy. 2 & Lundstrom St. 2/14/2011
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Volume (veh/h) 46 2271 36 23 2097 40 18 4 26 16 5 32
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) 47 2341 37 24 2162 41 19 4 27 16 5 33
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 2203 2378 3600 4687 1171 3504 4682 1081
vC1, stage 1 conf vol 2436 2436 2209 2209
vC2, stage 2 conf vol 1164 2251 1294 2473
vCu, unblocked vol 2203 2378 3600 4687 1171 3504 4682 1081
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 % 80 88 24 79 86 53 77 85
cM capacity (veh/h) 235 204 25 19 189 35 22 217
Direction, Lane # EB 1 EB 2 EB 3 EB 4 WB 1 WB 2 WB 3 WB 4 NB 1 NB 2 SB 1 SB 2
Volume Total 47 1171 1171 37 24 1081 1081 41 19 31 16 38
Volume Left 47 0 0 0 24 0 0 0 19 0 16 0
Volume Right 0 0 0 37 0 0 0 41 0 27 0 33
cSH 235 1700 1700 1700 204 1700 1700 1700 25 87 35 99
Volume to Capacity 0.20 0.69 0.69 0.02 0.12 0.64 0.64 0.02 0.76 0.36 0.47 0.38
Queue Length 95th (ft) 18 0 0 0 10 0 0 0 57 35 40 39
Control Delay (s) 24.1 0.0 0.0 0.0 25.0 0.0 0.0 0.0 327.4 67.9 178.8 62.4
Lane LOS C C F F F F
Approach Delay (s) 0.5 0.3 165.2 97.5
Approach LOS F F
Intersection Summary
Average Delay 3.2
Intersection Capacity Utilization 77.1% ICU Level of Service D
Analysis Period (min) 15
Description: Add EB/WB Rt turn bays
Add NB/SB Left turn bays
West Plains Development Traffic Impact Analysis
Synchro 7 - Report
2032-Alternative 3 Buildout-Mitigated Page 2