ITS to AddressNon-Signalized Rural Intersection Safety

Ray Starr, Assistant State Traffic EngineerIntelligent Transportation Systems SectionMinnesota Department of Transportation

Crash Analysis

Crashes

• Right angle crashes are overrepresented at rural STOP controlled intersections.

• Most of the fatal crashes are stop and proceed.

• Strategies to address include use of ITS technologies.

Traditional Safety Strategies

• Improve Geometry– Partial and full grade separation on expressways

• Enhance traditional signsand markings

• Install street lights

Three Major ITS Systems

• CICAS – Stop Sign Assist– Rural Expressways– Gap Based

• Intersection Collision Warning– Mainline Warning– Cross Street Warning

• Stop Sign Warning

Goals

• Effective – Reduce Fatal Crashes• Reliable• Appropriate Cost for the Location

CICAS-SSA• Cooperative Intersection Collision Avoidance

Systems - Stop Sign Assist

Hwy 52 & Goodhue County 9

CICAS - SSA

Intersection Collision Warning

Cross Street Warning Mainline Warning

Stop Sign Warning

Safe Intersection Project

• Evaluate Commercial Off the Shelf (COTS) systems that are:

• Low-cost• Easy to operate and maintain• Readily deployable in rural areas

An Idea Whose Time Has Come!

Michigan ENTERPRISE Project

Virginia

North Carolina

Missouri

Pennsylvania

Maine

Future Activities

• FHWA Safety Initiative• ENTERPRISE Pooled Fund

Project• Promote Development of

Standards for MUTCD

MORE INFORMATION

Ray Starr

Assistant Traffic Engineer

Ray.Starr@state.mn.us

For ITS Projectshttp://www.dot.state.mn.us/guidestar/index.html