Appendix D Traffic Impact Analysis - westplainseis.com

HCM Signalized Intersection Capacity Analysis
5: Hwy. 2 & Hayford Rd. 2/10/2011
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Volume (vph) 505 1793 153 147 1990 217 121 204 175 360 138 359
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 5.5 5.5 5.5 5.5 5.5
Lane Util. Factor 0.97 0.95 1.00 1.00 0.95 1.00 1.00 0.95 1.00 1.00 0.95
Frt 1.00 1.00 0.85 1.00 1.00 0.85 1.00 1.00 0.85 1.00 0.89
Flt Protected 0.95 1.00 1.00 0.95 1.00 1.00 0.95 1.00 1.00 0.95 1.00
Satd. Flow (prot) 3467 3574 1599 1787 3574 1599 1805 3610 1615 1787 3187
Flt Permitted 0.95 1.00 1.00 0.95 1.00 1.00 0.95 1.00 1.00 0.95 1.00
Satd. Flow (perm) 3467 3574 1599 1787 3574 1599 1805 3610 1615 1787 3187
Peak-hour factor, PHF 0.94 0.94 0.94 0.94 0.94 0.94 0.94 0.94 0.94 0.94 0.94 0.94
Adj. Flow (vph) 537 1907 163 156 2117 231 129 217 186 383 147 382
RTOR Reduction (vph) 0 0 33 0 0 83 0 0 3 0 199 0
Lane Group Flow (vph) 537 1907 130 156 2117 148 129 217 183 383 330 0
Heavy Vehicles (%) 1% 1% 1% 1% 1% 1% 0% 0% 0% 1% 1% 1%
Turn Type Prot pm+ov Prot pm+ov Prot pm+ov Prot
Protected Phases 5 2 3 1 6 7 3 8 1 7 4
Permitted Phases 2 6 8
Actuated Green, G (s) 12.5 59.1 72.6 8.5 55.1 71.6 13.5 15.9 24.4 16.5 18.9
Effective Green, g (s) 12.5 59.1 72.6 8.5 55.1 71.6 13.5 15.9 24.4 16.5 18.9
Actuated g/C Ratio 0.10 0.48 0.60 0.07 0.45 0.59 0.11 0.13 0.20 0.14 0.15
Clearance Time (s) 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5
Vehicle Extension (s) 3.0 2.5 3.0 3.0 2.1 3.0 3.0 3.0 3.0 3.0 3.0
Lane Grp Cap (vph) 355 1731 1024 125 1614 938 200 470 396 242 494
v/s Ratio Prot c0.15 0.53 0.01 0.09 c0.59 0.02 0.07 0.06 0.03 c0.21 c0.10
v/s Ratio Perm 0.07 0.07 0.08
v/c Ratio 1.51 1.10 0.13 1.25 1.31 0.16 0.65 0.46 0.46 1.58 0.86dr
Uniform Delay, d1 54.8 31.4 10.8 56.8 33.5 11.5 52.0 49.1 43.0 52.8 48.6
Progression Factor 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00
Incremental Delay, d2 244.8 55.1 0.1 161.6 144.8 0.1 7.0 0.7 0.9 281.0 3.4
Delay (s) 299.6 86.6 10.9 218.4 178.2 11.6 58.9 49.8 43.9 333.8 52.0
Level of Service F F B F F B E D D F D
Approach Delay (s) 125.7 165.4 49.9 170.4
Approach LOS F F D F
Intersection Summary
HCM Average Control Delay 140.9 HCM Level of Service F
HCM Volume to Capacity ratio 1.30
Actuated Cycle Length (s) 122.0 Sum of lost time (s) 22.0
Intersection Capacity Utilization 113.3% ICU Level of Service H
Analysis Period (min) 15
Description: Optimized
dr Defacto Right Lane. Recode with 1 though lane as a right lane.
c Critical Lane Group
2019 plus Project, Alt. 1, PH3 Synchro 7 - Report
cak Page 1