Appendix D Traffic Impact Analysis - westplainseis.com

MOVEMENT SUMMARY
West Dwy./Hwy. (YEAR 2012 PM PEAK, ALT.3,Buildout)
West Plains Development
Roundabout
Site: Roundabout
Movement Performance - Vehicles
Mov ID Turn
Demand
Deg. Average Level of 95% Back of Queue Prop. Effective Average
Flow HV Satn Delay Service Vehicles Distance Queued Stop Rate Speed
veh/h % v/c sec veh ft per veh mph
East: Hwy. 2
6T T 1365 1.0 0.618 10.1 LOS B 5.5 139.4 0.42 0.37 25.4
6R R 270 1.0 0.618 9.9 LOS A 5.5 139.4 0.41 0.47 25.5
Approach 1635 1.0 0.618 10.1 LOS B 5.5 139.4 0.42 0.38 25.4
North: West Dwy.
7L L 173 1.0 0.323 12.3 LOS B 1.6 40.5 0.77 0.94 22.7
4R R 175 1.0 0.323 10.6 LOS B 1.6 40.5 0.77 0.87 25.0
Approach 348 1.0 0.323 11.5 LOS B 1.6 40.5 0.77 0.91 23.7
West: Hwy. 2
5L L 93 1.0 0.132 6.5 LOS A 0.5 13.5 0.36 0.67 24.9
2T T 1415 1.0 0.584 10.0 LOS A 4.4 111.8 0.51 0.48 26.1
Approach 1509 1.0 0.584 9.8 LOS A 4.4 111.8 0.50 0.49 26.0
All Vehicles 3491 1.0 0.618 10.1 LOS B 5.5 139.4 0.49 0.48 25.5
Level of Service (LOS) Method: Delay (HCM 2000).
Roundabout LOS Method: Same as Signalised Intersections.
Vehicle movement LOS values are based on average delay per movement
Intersection and Approach LOS values are based on average delay for all vehicle movements.
Roundabout Capacity Model: SIDRA Standard.
HCM Delay Model used.
Processed: Wednesday, July 13, 2011 8:04:20 AM Copyright © 2000-2011 Akcelik and Associates Pty Ltd
SIDRA INTERSECTION 5.1.3.1990
www.sidrasolutions.com
Project: P:\S\SPTR00000001\0600INFO\Traffic\April 2011-Final TIA\Sidra\7-12-11\Hwy.2-West Roundabout\Alt3-
Buildout.sip
8000011, DAVID EVANS & ASSOCIATES INC, SINGLE