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Appendix D Traffic Impact Analysis - westplainseis.com

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HCM Signalized Intersection Capacity <strong>Analysis</strong><br />

5: Hwy. 2 & Hayford Rd. 2/14/2011<br />

Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR<br />

Lane Configurations<br />

Volume (vph) 582 1853 154 179 2073 264 113 248 213 438 168 402<br />

Ideal Flow (vphpl) 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900<br />

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<br />

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<br />

Frt 1.00 1.00 0.85 1.00 1.00 0.85 1.00 1.00 0.85 1.00 0.89<br />

Flt Protected 0.95 1.00 1.00 0.95 1.00 1.00 0.95 1.00 1.00 0.95 1.00<br />

Satd. Flow (prot) 3467 3574 1599 1787 3574 1599 1805 3610 1615 1787 3196<br />

Flt Permitted 0.95 1.00 1.00 0.95 1.00 1.00 0.95 1.00 1.00 0.95 1.00<br />

Satd. Flow (perm) 3467 3574 1599 1787 3574 1599 1805 3610 1615 1787 3196<br />

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<br />

Adj. Flow (vph) 619 1971 164 190 2205 281 120 264 227 466 179 428<br />

RTOR Reduction (vph) 0 0 31 0 0 79 0 0 5 0 220 0<br />

Lane Group Flow (vph) 619 1971 133 190 2205 202 120 264 222 466 387 0<br />

Heavy Vehicles (%) 1% 1% 1% 1% 1% 1% 0% 0% 0% 1% 1% 1%<br />

Turn Type Prot pm+ov Prot pm+ov Prot pm+ov Prot<br />

Protected Phases 5 2 3 1 6 7 3 8 1 7 4<br />

Permitted Phases 2 6 8<br />

Actuated Green, G (s) 14.5 52.0 64.5 9.5 47.0 69.5 12.5 14.3 23.8 22.5 24.3<br />

Effective Green, g (s) 14.5 52.0 64.5 9.5 47.0 69.5 12.5 14.3 23.8 22.5 24.3<br />

Actuated g/C Ratio 0.12 0.43 0.54 0.08 0.39 0.58 0.10 0.12 0.20 0.19 0.20<br />

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<br />

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<br />

Lane Grp Cap (vph) 418 1545 930 141 1396 924 188 429 393 334 646<br />

v/s Ratio Prot 0.18 c0.55 0.01 0.11 c0.62 0.04 0.07 0.07 0.04 c0.26 c0.12<br />

v/s Ratio Perm 0.07 0.09 0.09<br />

v/c Ratio 1.48 1.28 0.14 1.35 1.58 0.22 0.64 0.62 0.57 1.40 0.60<br />

Uniform Delay, d1 52.9 34.1 14.0 55.4 36.6 12.3 51.7 50.4 43.6 48.9 43.6<br />

Progression Factor 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00<br />

Incremental Delay, d2 228.9 129.3 0.1 195.9 264.2 0.1 6.9 2.6 1.9 195.2 1.5<br />

Delay (s) 281.8 163.4 14.1 251.3 300.9 12.4 58.7 53.0 45.4 244.1 45.1<br />

Level of Service F F B F F B E D D F D<br />

Approach Delay (s) 181.1 267.1 51.3 131.5<br />

Approach LOS F F D F<br />

Intersection Summary<br />

HCM Average Control Delay 194.8 HCM Level of Service F<br />

HCM Volume to Capacity ratio 1.26<br />

Actuated Cycle Length (s) 120.3 Sum of lost time (s) 11.0<br />

Intersection Capacity Utilization 123.4% ICU Level of Service H<br />

<strong>Analysis</strong> Period (min) 15<br />

Description: Optimized<br />

c Critical Lane Group<br />

West Plains Development <strong>Traffic</strong> <strong>Impact</strong> <strong>Analysis</strong> 5:00 pm 2/8/2011 2032 Alternative 3 Buildout<br />

Synchro 7 - Report<br />

Page 5

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