1. 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

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

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

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

5. Data Collection & Analysis
JAMAR Traffic Counter
Synchro 6

6. JAMAR & Synchro Report

7. 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.

8. 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)

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

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

11. 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.

12. 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.,