SIGNALIZED INTERSECTION IMPROVEMENT STUDY ECIV 542 CLASS PROJECT SIGNALIZED INTERSECTION IMPROVEMENT STUDY BLOSSOM AT PICKENS Omor Sharif Muchun Song Narges Kaveshgar Quyen Pham Chih-Yao Lin

Table of Contents 1 2 3 4 Introduction Intersection characteristics Proposed improvement 3 Conclusion 4

Introduction Why improvement? Past design can’t fit in current situation Where to improve? Blossom @ Pickens

Intersection Characteristics 30mph Downtown Columbia 35mph C=134 Y=3 R=2

Data Collection & Analysis JAMAR Traffic Counter Synchro 6

JAMAR & Synchro Report

Level of Service Criteria – Signalized Intersections (TRB, HCM2000) LOS Seconds Delay/Vehicle Description A ≤10 Most vehicles do not stop at all. B >10 and ≤20 More vehicles stop than for LOS A. C >20 and ≤35 The number of vehicles stopping is significant, although many pass through without stopping. D >35 and ≤55 Many vehicles stop. Individual cycle failures are noticeable E >55 and ≤80 Considered being the limit of acceptable delay. Individual F >80 Unacceptable delay.

Proposed Improvements Increase lane width Increase lane width on minor St. from 10’ -> 12’ (insignificant) Right turn channelization Introduce channelized right turns with yield control on minor St. (LOS: E->D) Additional lanes Provide an additional travel lane to minor street. Signal Timing Optimization Use Synchro-suggested (62,64) phase than current (80,54) (LOSM: E->F；LOSm: F->D)

Improvement of this intersection is needed Conclusion Improvement of this intersection is needed More aspects should be considered (safety, cost)

Thank You ! ECIV 542 CLASS PROJECT Omor Sharif Muchun Song Narges Kaveshgar Quyen Pham Chih-Yao Lin

Reference 1. Intersections Improvements Study, Prepared for the City of Piqua Ohio, January 2009, Kleingers & Associates, Inc. 2. Oldham county intersection improvement study report oldham county, Kentucky, December 2006, DLZ Kentucky, Inc. 3. Intersection Improvement Study Hendricks County Road 100 South & Dan Jones Road Avon, Indiana, November 2003, DLZ Indiana, LLC 4. Manual of Uniform Traffic Control Devices, Federal Highway Administration, U.S. Department of transportation, Washington DC, December 2009.

Reference (continued) 5. Highway Capacity Manual, 4th Edition, Transportation Research Board, National Research Council, Washington DC, 2000 6. A policy on Geometric Design of Highways and Streets, 5th Edition, American Association of State Highway and Transportation Officials (AASHTO), Washington DC, 2004. 7. Traffic Engineering, 4th Edition, R. P. Roess, E. S. Prassas and W. R. McShane, Prentice Hall New Jersey, 2008. 8. SYNCHRO 6, Synchro plus SimTraffic User Guide, Trafficware Ltd., www.trafficware.com