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.
In an article published in January 2018, Business Insider listed the most dangerous intersection in every state in the USA, and in each case there was an accompanying photograph, although not always from a suitable angle or elevation.
From what can be seen in the photographs, many of the intersections would benefit tremendously from the installation of a roundabout. Roundabouts don’t necessarily reduce the overall number of collisions — indeed when first installed a roundabout may see an increase in the number of minor collisions while people get used to the new type of intersection — but the number of serious collisions, involving injuries and deaths, will drop dramatically as long as the roundabout is well-designed, and just as importantly, as long as the drivers in that state are being taught the best way to drive into, around and out of roundabouts. However, while the first of these points is increasingly being met (although not so in the first photograph shown below), the second — the education aspect — is deliberately and unforgivably being rejected by the FHWA, and as a result, all state-level DOTs that we know of.