Traffic Safety Evaluation of Lane Constrictor Intersections in MinnesotaStatus: CompleteReport Date: 02/08/2024 Summary: Between 2018 and 2019, MnDOT installed a lane constrictor design at 66 side-street stop controlled intersections in Minnesota. The lane constrictor design narrows the lane width for mainline approaches via a striped median with centerline rumble strips. By narrowing the mainline lane, the goal for this design is to encourage mainline traffic to slow down as they approach the intersection. The striped median also provides greater separation between mainline directions and draws more attention to the location of the intersection. With the installation of lane constrictors at MnDOT intersections, overall crash rates saw little change but there were decreases in KA and KABC crash rates. These results indicate the addition of lane constrictors have a positive impact on crashes by reducing the severity of crashes swapping injury crashes for property damage only crashes. Final Deliverables: Traffic Safety Evaluation of Lane Constrictor Intersections in Minnesota (Report #2024-03) Related Materials: Related Research: Project Personnel: Principal Investigator: Maxwell Moreland Co-Principal Investigator: Derek Leuer, Eric DeVoe, Ryan Mwangi Project Coordinator: Not Available
