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Continuous Flow Intersection. March, 2007. Why are we here?. Discuss Continuous Flow Intersection compared to Standard Intersection Update permit status Answer your questions. What is this and why?. CFI Benefits. - PowerPoint PPT Presentation
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Continuous Flow Intersection
March, 2007
Why are we here?
Discuss Continuous Flow Intersection compared to Standard IntersectionUpdate permit statusAnswer your questions
What is this and why?
CFI Benefits
CFI is an at-grade design that provides comparable levels of vehicular flow to grade-separated interchanges at a fraction of the cost—and dramatic, long-term improvements over conventional at-grade approaches – ABMB Engineers
Benefits of CFI
Improved Level of Service (LOS) Less Delay Increased Capacity More Mainline Green Time Existing: 80 sec out of 150, 53% Traditional: 54 sec out of 115, 47% CFI: 74 sec out of 115, 64%
Benefits of CFI
Provides relief to entire system 141 @ Gravois (MO 30) 141 @ Gravois Bluffs Overall LOS D reduced LOS C
Lower cost than grade separation More consecutive movements
Level Of Service
Basically, average time each vehicle is stopped at a signal
Level Of Service - 2010
Existing (current): LOS C, Delay 24.6 sec/veh
Traditional LOS D, Delay 35.4 sec/veh
CFI LOS B, Delay 17.3 sec/veh
Level Of Service - 2030
25% Increase in TrafficTraditional LOS F, Delay 110.1 sec/veh
CFI LOS C, Delay 29.5 sec/veh
Level Of Service - 2030
WB PM Peak Hour - 2,890 veh/hrTraditional Delay 110.1 sec/veh => 88.4 hours
CFI Delay 29.5 sec/veh => 23.7 hours
Consultant’s Conclusion “Both types of intersection configurations
studied (continuous flow, dual lefts)…will provide the necessary capacity to accommodate the projected 2010 peak hour volumes. However, the dual left-turn lane concept would operated to LOS F during peak hours, whereas the continuous flow intersection concept would operate at LOS C during these hours. Therefore, the latter configuration would accommodate greater thru traffic volumes along Hwy 30 in the future.”
How Does It Work?
Questions?
Contact Information:
MoDOT Customer Service 1-888-ASK-MODOT