By: ScottRAB

ScottRAB — Thu, 21 Jun 2012 20:01:59 +0000

Modern roundabouts are the safest form of intersection in the world. Search http://www.iihs.org for FAQs and safety facts. The safety comes from the ‘slow and go’ operation instead of the ‘stop or go fast’ way a stop light works (or the ‘keep going fast’ large traffic circle fantasy). The smaller size of the modern roundabout is what makes them safer and keeps speeds in the 20 mph range. This makes it much easier to avoid a crash or stop for pedestrians. It also means that if a crash happens the likelihood of injury is very low. Safety is the #1 reason there are over 2,400 modern roundabouts in the US today and many more on the way.
Slow and go also means less delay than a stop light, especially the other 20 hours a day people aren’t driving to or from work. Average daily delay at a signal is around 12 seconds per car. At a modern roundabout average delay is less than five seconds. Signals take an hour of demand and restrict it to a half hour, at best only half the traffic gets to go at any one time. At a modern roundabout four drivers entering from four directions can all enter at the same time. Don’t try that with a signalized intersection.
The essential factor, though, is to make sure traffic in the circular roadway can’t go much faster than 20 mph. For the very curious search ‘turbo roundabouts’ – turbo referring to the pattern, not the speed.

Comments on: Community House Road roundabout could be two lanes

By: ScottRAB