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MDOT research: dynamic speed feedback signs reduce speeds by about 4 mph, to be tested in school zones
Summary
Michigan Department of Transportation research finds dynamic speed feedback signs can slow drivers about 4 mph; MDOT has developed placement and design specifications and plans a third research phase in late 2025 focused on school zones and high‑pedestrian areas.
The Michigan Department of Transportation has conducted a series of research studies on dynamic speed feedback signs and found they can slow drivers and reduce crashes, a speaker identified in the transcript as Speaker 1 said. "Dynamic speed feedback signs, which use radar to measure vehicle speeds in real time and issue targeted warning messages to drivers, are a proven strategy for slowing traffic and reducing crashes," Speaker 1 said.
The research examined how to design and install the signs so they are more visible and effective in different settings, Speaker 1 said. MDOT…
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