AASHTO SCOHTCHALLENGES: ROUNDABOUTS

Peter LynchUW TOPS Lab - Madison WI

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

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

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

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

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

CLASS I EXAMPLE•Off tracking upon entry, moving through circulating roadway and exit

•Typically single lane roundabout

CLASS II EXAMPLE•Trucks stay in lane on entry and exit

•Trucks off track in circulating roadway

•Could be single or multilane

CLASS III EXAMPLE•Truck designed to stay in lane on entry circulation and exit

•Almost always a multilane roundabout

THINGS TO CONSIDER

Trucks and roundabouts can workTrucking Industry cares about safety tooEducation is keyEffective outreach takes time and the right

message

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?

DESIGN OR EDUCATION?

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)

QUESTIONS

Peter LynchFreight Operation Program Manager

peter.lynch@dot.wi.gov(608) 267-4486