Improving Rural Intersection Safety and Efficiency with Dynamic Dilemma Zone Protection: Alabama Pilot Study
Alabama
Rural high-speed intersections in Alabama experienced several benefits, including 24-35% fewer red light-runner crashes, in a pilot of CWA (continuous wide area) sensors used in a dynamic DZP (dilemma zone protection) system.
Connecticut DOT formed a roundabout committee of professionals trained on evaluating the planning, design, and construction of roundabouts on municipal and state roads.
Traditional traffic control devices were failing on high-speed roads in Florida. FDOT saw significant and sustained reductions in extreme speeding after adding speed shields to S.R. 46. The speed shields are an innovative, low-cost countermeasure that delivered immediate and sustained speed reductions.
FDOT developed a context classification guide for roadway design. Target speeds are determined by many data points, by context classification and for the safe mobility of all users.
Human Factors Approach: Let’s Get Everyone Home, Safely
Florida
Florida HP and FLHSMV reached millions of young males with a media campaign featuring calls to action for three behaviors: aggressive driving/stress management, speeding/time management, and distracted driving/multitasking.
Post SS4A Implementation Management for Albany, Georgia
Georgia
GDOT tracks its Comprehensive Safety Action Plan through a website and regular meetings of the SS4A Stakeholder Committee. Monitoring detects tool effectiveness and collects data for future funding opportunities.
US-31/M-72 had frequent fog, blowing snow, and a severe crash pattern. After adding a center median, edgeline and centerline corrugations, guardrail, new pavement, and a flashing low visibility warning system, the segment had less severe crashes.
Concerned with rural intersections crashes, MnDOT developed a standard layout of lane constrictors. They installed lane constrictors at 61 side street, stop-controlled locations.
The MnDOT Safe System Approach Implementation Plan integrates the SSA into programming. Their process involves an internal SSA implementation workgroup, tools library, speed management guide, training, and updated technical guidance documents.
