Appendix D Traffic Impact Analysis - westplainseis.com

HCM Unsignalized Intersection Capacity Analysis
1: Hwy. 2 & Craig Road 2/8/2011
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Volume (veh/h) 93 1453 225 82 1243 213 162 80 66 160 68 72
Sign Control Free Free Stop Stop
Grade 0% 0% 0% 0%
Peak Hour Factor 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93
Hourly flow rate (vph) 100 1562 242 88 1337 229 174 86 71 172 73 77
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 1566 1804 2721 3504 781 2608 3517 668
vC1, stage 1 conf vol 1762 1762 1513 1513
vC2, stage 2 conf vol 959 1742 1095 2004
vCu, unblocked vol 1566 1804 2721 3504 781 2608 3517 668
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 % 76 74 0 0 79 0 0 81
cM capacity (veh/h) 423 342 0 4 340 0 3 403
Direction, Lane # EB 1 EB 2 EB 3 EB 4 WB 1 WB 2 WB 3 WB 4 NB 1 SB 1
Volume Total 100 781 781 242 88 668 668 229 331 323
Volume Left 100 0 0 0 88 0 0 0 174 172
Volume Right 0 0 0 242 0 0 0 229 71 77
cSH 423 1700 1700 1700 342 1700 1700 1700 0 0
Volume to Capacity 0.24 0.46 0.46 0.14 0.26 0.39 0.39 0.13 Err Err
Queue Length 95th (ft) 23 0 0 0 25 0 0 0 Err Err
Control Delay (s) 16.1 0.0 0.0 0.0 19.2 0.0 0.0 0.0 Err Err
Lane LOS C C F F
Approach Delay (s) 0.8 1.0 Err Err
Approach LOS F F
Intersection Summary
Average Delay
Err
Intersection Capacity Utilization 75.8% ICU Level of Service D
Analysis Period (min) 15
2012 plus Project, Alt. 1, PH1 Synchro 7 - Report
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