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Simulation-Based Impact Analysis of Signalized Intersections

This research study focuses on the impact of vehicular delay and carbon monoxide (CO) emissions at the intersection of Martin Luther King Drive and Clifton Avenue. We aim to identify the relationship between vehicle delay and CO emissions, assess existing conditions, and propose solutions to minimize both. Our findings indicate an unacceptable CO emission rate of 44.97g/hr and highlight the need for balanced levels of service. Alternative solutions propose adjustments to signal timing to improve traffic flow and reduce emissions.

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Simulation-Based Impact Analysis of Signalized Intersections

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

  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. This is unacceptable! This is good!

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

  8. Alternative Solution 1 Satisfactory (from “F”) 2.59s/veh better More Balanced

  9. Alternative Solution 2 • Alternative Solution 1 +

  10. Alternative Solution 2 BEST! 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. Lane Group Delay and LOS Rating Acknowledgements 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

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