aashto scoht challenges: roundabouts
DESCRIPTION
AASHTO SCOHT Challenges: Roundabouts. Peter Lynch UW TOPS Lab - Madison WI. Overview. My Background WisDOT Minnesota Wisconsin Truck and Roundabout Study. Take- aways - PowerPoint PPT PresentationTRANSCRIPT
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AASHTO SCOHTCHALLENGES: ROUNDABOUTS
Peter LynchUW TOPS Lab - Madison WI
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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
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BACKGROUND3 Years driving trucks5 Years at Michigan DOT1 Year private sector4 plus years at UW TOPS Lab working on site
at WisDOT in OperationsTRB Truck Size and WeightTRB Roundabout Committee
Subcommittee Chair Trucking and Roundabouts
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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
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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
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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
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CLASS I EXAMPLE•Off tracking upon entry, moving through circulating roadway and exit
•Typically single lane roundabout
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CLASS II EXAMPLE•Trucks stay in lane on entry and exit
•Trucks off track in circulating roadway
•Could be single or multilane
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CLASS III EXAMPLE•Truck designed to stay in lane on entry circulation and exit
•Almost always a multilane roundabout
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THINGS TO CONSIDER
Trucks and roundabouts can workTrucking Industry cares about safety tooEducation is keyEffective outreach takes time and the right
message
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THINGS TO CONSIDER (CONT)
What do you want trucks to do when they approach the intersection?
Design based on Percent vs. actual countDesign or speed a factor when trucks crash in
Roundabouts?
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DESIGN OR EDUCATION?
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GOVERNORS HIGHWAY SAFETY CONFERENCE
Aug 8th, 2013Holiday Inn Hotel and Convention Center
Stevens Point, Wisconsin½ day enforcement and industryIn depth Presentation and roll up the sleeves
and talk about Roundabouts and other design concepts (DDI, SPI, Turbine, etc)