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ATM in Minnesota During Weather Events

ATM in Minnesota During Weather Events. Brian Kary Freeway Operations Engineer. Active Traffic Management. IIntelligent Lane Control Signals. ILCS located every ½ mile over every lane. ILCS are a 4ft x 5ft full color matrix signs.

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ATM in Minnesota During Weather Events

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  1. ATM in Minnesota During Weather Events Brian Kary Freeway Operations Engineer

  2. Active Traffic Management

  3. IIntelligentLane Control Signals • ILCS located every ½ mile over every lane. • ILCS are a 4ft x 5ft full color matrix signs. • Use of the ILCS is for incident management , speed harmonization and priced dynamic shoulder lane. • I-35W – about 190 ILCS • I-94 – about 110 ILCS

  4. ILCS Sign Options Blank – default Green – Lane Open Flashing Yellow – Caution Red X – Closed Yellow X – Closed Ahead Merge Speed Limit White Diamond

  5. Variable Speed Limits • Advisory Only • Detection measures traffic speeds downstream • Speeds are posted up to 1 ½ miles upstream

  6. Overview of VSL Control • Goal is to mitigate shock wave propagation from downstream bottleneck by gradually reducing speed levels of incoming traffic flow. Speed Direction of Travel

  7. Advisory Variable Speed Limits ◊ ◊ ◊ 40 MPH 35 MPH 40 MPH 35 MPH 40 MPH 35 MPH 40 MPH 35 MPH Congested Traffic

  8. Advisory Variable Speed Limits ◊ ◊ ◊ 40 MPH 35 MPH 40 MPH 35 MPH 40 MPH 35 MPH 40 MPH 35 MPH Congested Traffic

  9. VSL Control During Weather • VSL system uses a constant deceleration rate to determine advisory speed limit values. • Preferred deceleration rates are different during weather. • Upper speed limit cap is 5 MPH less than posted speed limit. • System posting 60 MPH during snow events. • Have since changed upper speed limit cap to 50 MPH • Developing new techniques for VSL operations during weather events.

  10. I-35W MnPASS: Active Traffic Management PDSL Open

  11. Priced Dynamic Shoulder Lane (PDSL): Segment 3: 3 miles Priced Dynamic Shoulder Lane North of 42nd St on NB 35W Maintains existing 4 lanes with an added PDSL Lane Effectively extends the MnPASS lane to downtown Minneapolis using existing road space

  12. Innovative Use of Technology and Infrastructure

  13. I-35W MnPASS: Active Traffic Management PDSL Closed

  14. I-35W MnPASS: In Pavement Lighting PDSL Closed

  15. I-35W MnPASS: In Pavement Lighting PDSL Open

  16. I-35W MnPASS: In Pavement Lighting

  17. I-35W MnPASS: In Pavement Lighting Corrosion and Failure

  18. PDSL During Snow & Ice • PDSL is left open during snow & ice events • Traffic helps to spread de-icing material

  19. ATM During Rainfall Event • Shoulder designed to allow some ponding during heavy rainfall. • Section of I-35W where MnPASS lane is on the old inside shoulder. • Investigating the use of rainfall sensor to deploy warning message or advisory speed limit.

  20. Questions? Brian Kary Freeway Operations Engineer

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