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AASHTO SCOHT Challenges: Roundabouts

AASHTO SCOHT Challenges: Roundabouts. Peter Lynch UW TOPS Lab - Madison WI. Overview. My Background WisDOT Minnesota Wisconsin Truck and Roundabout Study. Take- aways

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AASHTO SCOHT Challenges: Roundabouts

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  1. AASHTO SCOHTChallenges: Roundabouts Peter Lynch UW TOPS Lab - Madison WI

  2. Overview • My Background • WisDOT • Minnesota Wisconsin Truck and Roundabout Study • Take-aways • Things to consider regarding trucks and specialized transport when installing roundabouts and other innovative intersections and interchanges

  3. Background • 3 Years driving trucks • 5 Years at Michigan DOT • 1 Year private sector • 4 plus years at UW TOPS Lab working on site at WisDOT in Operations • TRB Truck Size and Weight • TRB Roundabout Committee • Subcommittee Chair Trucking and Roundabouts

  4. WisDOT Freight Operations Program Manager • Permit Support • OSOW FN • Design Support • Operations Support • Incident • Work zones • Carrier Risk/Escort • Policy Support • Outreach • Operations focused • Truck Size and Weight Study 08-09 • Est OSOW Freight Network • Industry Outreach • IOH Study

  5. Roundabouts and Trucking • OSOW Community • OSOW FN • RABs plotted and noted in routing system • FDM Design Guidance • Check Vehicles • Standard Trucking • CDL Manual • FDM Design Guidance • Individual project outreach if they attend • Trucking Summit

  6. MN/WI Trucks and Roundabouts Study • Pooled Fund • Focus on how to design for standard semi trucks • Balance safety with freight mobility • Did not focus on OSOW (KDOT same time) • Ideal features that preserve safety goals while not creating an impediment for trucks • 3 primary outcomes • Class I, II, & III

  7. Class I Example Off tracking upon entry, moving through circulating roadway and exit Typically single lane roundabout

  8. Class II Example Trucks stay in lane on entry and exit Trucks off track in circulating roadway Could be single or multilane

  9. Class III Example Truck designed to stay in lane on entry circulation and exit Almost always a multilane roundabout

  10. Things to consider • Trucks and roundabouts can work • Trucking Industry cares about safety too • Education is key • Effective outreach takes time and the right message

  11. Things to Consider (cont) • What do you want trucks to do when they approach the intersection? • Design based on Percent vs. actual count • Design or speed a factor when trucks crash in Roundabouts?

  12. Design or Education?

  13. Governors Highway Safety Conference • Aug 8th, 2013 • Holiday Inn Hotel and Convention Center Stevens Point, Wisconsin • ½ day enforcement and industry • In depth Presentation and roll up the sleeves and talk about Roundabouts and other design concepts (DDI, SPI, Turbine, etc)

  14. Questions Peter Lynch Freight Operation Program Manager peter.lynch@dot.wi.gov (608) 267-4486

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