ScottRAB

ScottRAB 1 year ago

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.

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ScottRAB 1 year, 2 months ago

Fire,

I'm still not convinced. Can you direct me to a photo of the 'modern roundabouts' you've driven through - maybe via google? Many of the circular intersections in Italy and the Middle East are the older, large diameter rotaries.

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ScottRAB 1 year, 2 months ago

Many people confuse older styles of circular intersections with modern roundabouts.

If it has a stop sign, it’s not a modern roundabout. If you could play a game of football in the center landscaped area, it’s not a modern roundabout. If the circular roadway has a stop sign, yield sign or signal, it’s not a modern roundabout. If you don’t have to slow down to enter it, it’s not a modern roundabout. If you have to change lanes in the circular roadway to exit, it’s not a modern roundabout. If you can easily drive faster than 25 mph in the circular roadway, it’s not a modern roundabout.

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ScottRAB 1 year, 2 months ago

Fire,

You also are confusing rotaries and traffic cirlces with modern roundabouts.

To reiterate, 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 (http://tinyurl.com/3hjrqus ).

As long as the rotary remains in place, there will continue to be the poor safety record and congestion problems that naturally come with such a large circular intersection.

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ScottRAB 1 year, 2 months ago

JER,

You're confusing modern roundabouts with rotaries (UK roundabouts) and traffic cirlces. 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 (http://tinyurl.com/3hjrqus ). Modern roundabouts do not typically exceet 200 feet in diameter. This is so the circulating speeds stay below 25 mph. The decrease in delay associated with modern roundabouts has to do with the difference between zero mph (signals and rotaries) and 25 mph with typically only about a 5 second average delay to entering vehicles during rush hour. Modern roundabouts are the safest form of intersection in the world. Visit 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.

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ScottRAB 1 year, 3 months ago

Rotaries are known to be less safe than modern roundabouts. As long as the high speeds at the traffic circle are permitted to remain, crashes will keep on happening. Modern roundabouts are the safest form of intersection in the world. Visit www.iihs.org for FAQs and safety facts. 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 (http://tinyurl.com/3hjrqus ).

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