Appendix D Traffic Impact Analysis - westplainseis.com

HCM Signalized Intersection Capacity Analysis
1: Hwy. 2 & Craig Road 2/10/2011
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Volume (vph) 353 1924 244 109 1678 561 170 80 91 412 68 262
Ideal Flow (vphpl) 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900
Total Lost time (s) 5.5 5.5 5.5 5.5 5.5 5.5 5.0 5.0 5.0 5.0
Lane Util. Factor 1.00 0.95 1.00 1.00 0.95 1.00 1.00 1.00 1.00 1.00
Frt 1.00 1.00 0.85 1.00 1.00 0.85 1.00 0.92 1.00 0.88
Flt Protected 0.95 1.00 1.00 0.95 1.00 1.00 0.95 1.00 0.95 1.00
Satd. Flow (prot) 1787 3574 1599 1787 3574 1599 1787 1731 1787 1657
Flt Permitted 0.95 1.00 1.00 0.95 1.00 1.00 0.17 1.00 0.41 1.00
Satd. Flow (perm) 1787 3574 1599 1787 3574 1599 311 1731 767 1657
Peak-hour factor, PHF 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93
Adj. Flow (vph) 380 2069 262 117 1804 603 183 86 98 443 73 282
RTOR Reduction (vph) 0 0 53 0 0 265 0 31 0 0 103 0
Lane Group Flow (vph) 380 2069 209 117 1804 338 183 153 0 443 253 0
Heavy Vehicles (%) 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1%
Turn Type Prot Perm Prot Perm pm+pt pm+pt
Protected Phases 5 2 1 6 3 8 7 4
Permitted Phases 2 6 8 4
Actuated Green, G (s) 21.5 75.3 75.3 7.5 61.3 61.3 35.2 24.2 37.2 25.2
Effective Green, g (s) 21.5 75.3 75.3 7.5 61.3 61.3 35.2 24.2 37.2 25.2
Actuated g/C Ratio 0.15 0.54 0.54 0.05 0.44 0.44 0.25 0.17 0.27 0.18
Clearance Time (s) 5.5 5.5 5.5 5.5 5.5 5.5 5.0 5.0 5.0 5.0
Vehicle Extension (s) 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0
Lane Grp Cap (vph) 274 1922 860 96 1565 700 194 299 291 298
v/s Ratio Prot c0.21 0.58 0.07 c0.50 0.07 0.09 c0.13 0.15
v/s Ratio Perm 0.13 0.21 0.16 c0.27
v/c Ratio 1.39 1.08 0.24 1.22 1.15 0.48 0.94 0.51 1.52 0.85
Uniform Delay, d1 59.2 32.4 17.2 66.2 39.4 28.1 46.7 52.6 49.8 55.5
Progression Factor 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00
Incremental Delay, d2 195.1 44.6 0.7 161.9 76.5 2.4 48.3 1.5 251.9 19.4
Delay (s) 254.4 76.9 17.9 228.2 115.9 30.4 94.9 54.0 301.7 75.0
Level of Service F E B F F C F D F E
Approach Delay (s) 96.1 100.7 74.4 200.8
Approach LOS F F E F
Intersection Summary
HCM Average Control Delay 109.7 HCM Level of Service F
HCM Volume to Capacity ratio 1.27
Actuated Cycle Length (s) 140.0 Sum of lost time (s) 16.0
Intersection Capacity Utilization 116.0% ICU Level of Service H
Analysis Period (min) 15
Description: Signalized, Optimized
c Critical Lane Group
West Plains Development Traffic Impact Analysis 2/10/2011 2032-Alternative 2
Synchro 7 - Report
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