Engineering/Countermeasures
Engineering solutions that improve safety:
- Cable median barriers
- Roundabouts
- Reduced conflict intersections (RCI)
- Rumble strips, rumble stripEs and mumble strips
- Minnesota Evaluation of Six Inch Edgelines (PDF)
- Alternative intersection and road design
- Speed limits
- Highway 55 tailgating safety project
- Intersection safety analysis (PDF)
- Lighting levels for isolated intersections
- Intelligent transportation systems
- Three-Lane Roadway/Road Diet
Reference materials
- District Safety Plan Road Safety Strategies (Big Book of Ideas) (PDF)
- Traffic safety fundamentals handbook (PDF)
- Crash Modification Factors (CMF) Clearinghouse
- HSIP Benefit/Cost worksheet - revised January 2022 (Excel)
Topic summaries
- Enhanced edge line summary (PDF)
- Mumble strip summary (PDF)
- RCI summary (PDF)
- Road diet summary (PDF)
- Safety improvements summary (PDF)
- Speed limit summary (PDF)
- Transverse rumble strip summary (PDF)