ScottRAB

The cost of a SPUI is very high due to the length of the bridge required. And signals have a way of being ignored. Roundabout Corridors: Arizona: Sedona http://www.scenic179.com/Highways/Projects/SR179/ProjectMap.asp Route 89A, Clarkdale (5) Colorado: Avon http://www.avon.org/index.aspx?nid=133 S Golden Rd in Golden (5) California, Bird Rock http://www.slideshare.net/thecityalliance/bird-rock-ca-corridor-with-roundabouts Florida: Honore Ave, Fruitville to Bee Ridge, Sarasota (3?) Indiana: Most City intersections, Carmel Kansas: W 95th/Prairie Star Parkway, Lenexa (8) Minnesota: Shiloh Road, Billings (8) Oregon: SW Reed Market Road, Bend (5) Sheldon Park/Newport Ave, Bend (5) Washington: State Rte 539, Bellingham, WA (4) Grandview Dr, Olympic to 64th, University Place, WA (6)

If you want to see the difference between a traffic circle, a rotary (UK roundabout) and a modern roundabout, search www.k-state.edu to see pictures. www.fhwa.dot.gov has a video about modern roundabouts that is mostly accurate ( ). Modern roundabouts are the safest form of intersection in the world. Search 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.