U.S. Roundabouts can Create Risks and Confusion

On September 18, 2018, Maine DOT published the following wording and roundabout design on their Facebook page, but unfortunately the layout is unsatisfactory:

“It’s National Roundabout Week! Roundabouts have proven to be far safer than traditional intersections, but some people are still unsure of how to navigate them…” 

The problem is that, like most other states, Maine is apparently following the Federal Highways Administration [FHWA] ethos on roundabout construction but such guidelines deliberately ignore global best practices that have been developed over the fifty years in which the USA failed to build what are properly called “modern roundabouts.”  Sadly, the result is roundabouts that can have multiple potential safety flaws, just like the one in this illustration, as posted by Maine DOT.

The full layout of a new roundabout, as published by Maine DOT on September 18, 2018.

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