1. Simulation-Based Impact Analysis of Signalized Intersections Kelli Lee S.S/Science Todd Bonds S.S/Science Research Study Site: Intersection of Martin Luther King Drive and Clifton Avenue

2. GOAL : Improve vehicular delay and CO emissions at signalized intersections. Objectives: Identify relationship between vehicles’ delay and CO emission; Identify existing delay and CO emission; Propose solutions to minimize delay & CO emission.

3. Data Collection

4. Methodology

5. Delay and CO Results Correlated patterns on the peaks and valleys; Delay has an obvious impact on the CO concentration.

6. Existing Conditions LOSs of the different movements are unbalanced Overall emitted CO is 44.97g/hr. Movement Existing Condtions LOSDelay WB LTD42.43 WB TC29.23 WB RTB15.42 EB LTC29.52 EB TB17.42 EB RTA9.47 NB LTD41.81 NB TD39.69 NB RTB17.31 SB LTF101.80 SB TD39.15 SB RTB16.83 Overall AverageC33.19 This is good! This is unacceptable !

7. Alternative Solution 1 Phase 1Phase 2Phase 3Phase 4 Phase 5Phase 6 G: 4.0s Y: 3.0s R: 1.0s G: 9.0s Y: 3.0s R: 1.0s G: 24.0s Y: 3.6s R: 2.4s G: 11.0s Y: 3.0s R: 1.0s G: 0.5s Y: 3.0s R: 1.0s G: 13.5s Y: 3.6s R: 2.4s Phase 1Phase 2Phase 3Phase 4 G: 6.0s Y: 3.0s R: 1.0s G: 38.0s Y: 3.6s R: 2.4s G: 11.0s Y: 3.0s R: 1.0s G: 15.0s Y: 3.6s R: 2.4s Cycle length remains 90 seconds

8. Movement Existing CondtionsAlternative One LOSDelayLOSDelay WB LTD42.43D38.62 WB TC29.23C29.68 WB RTB15.42B15.04 EB LTC29.52D43.60 EB TB17.42C30.71 EB RTA9.47B13.96 NB LTD41.81D40.37 NB TD39.69D43.32 NB RTB17.31B19.30 SB LTF101.80D35.45 SB TD39.15C32.39 SB RTB16.83B13.00 Overall AverageC33.19C30.60 2.59s/veh better Satisfactory (from “F”) Alternative Solution 1 More Balanced

9. Alternative Solution 2 Alternative Solution 1 +

10. Alternative Solution 2 Movement Existing CondtionsAlternative OneAlternative Two LOSDelayLOSDelayLOSDelay WB LTD42.43D38.62C26.69 WB TC29.23C29.68C25.18 WB RTB15.42B15.04B12.04 EB LTC29.52D43.60D42.71 EB TB17.42C30.71C29.91 EB RTA9.47B13.96B12.65 NB LTD41.81D40.37D43.41 NB TD39.69D43.32D41.88 NB RTB17.31B19.30B19.66 SB LTF101.80D35.45C34.17 SB TD39.15C32.39C33.58 SB RTB16.83B13.00B13.90 Overall AverageC33.19C30.60C28.32 BEST!

11. Conclusions Correlated patterns on the peaks and valleys Existing LOS unbalanced; Southbound left turn unacceptable LOS F. Alternative Solution 1: delay 7.78%, CO emission 4.26%, Alternative Solution 2: delay 14.68%, CO emission 9.68%, Recommendations: Alternative Solution 1 short-term solution Alternative Solution 2 long-term plan

12. Questions??? THANK YOU!!

13. Acknowledgements Lane Group Delay and LOS Rating Andrea Burrows, RET Grant Coordinator Dr. Anant Kukreti, RET Project Director Dr. Heng, Wei, Associate Professor, Ph.D., P.E. Zhixia Li, Ph.D. Student and Research Assistant Zhuo Yao, Ph.D. Student, Research Assistant Project RET is funded through NSF Grant # EEC-0808696