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Dynamic Lane Merge System Ranged From $60,000 to $75,000 Based on Purchased Installations in Michigan and Minnesota.

In 2014, the Federal Highway Administration published the Work Zone Intelligent Transportation System (WZITS) Implementation Guide to provide information on implementing ITS in work zones. This 2021…
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Made Public Date
02/26/2026

Dynamic Speed Feedback Signs (DSFS) Can Lower Ramp Curve Entry Speeds by 4.5 mi/h, Reducing Risk of Lane Departures When Installed 250 ft to 400 ft Upstream of Freeway Interchange Exit Ramps.

METHODOLOGY This study examined three commercially available DSFS signs at six different freeway interchange ramps in Michigan. The evaluation tested several aspects of the DSFS, including physical…
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Date Posted
04/24/2024