Comment Re:waste of time (Score 1) 380
numbers were way off.. but still 5 more cars per minute is impressive.
4 way stop average number of cars through in 15 minutes was 385.
Roundabout average number of cars through in 15 minutes was 460.
Improvement of about 20%.
If you don't care to watch the video they set up a 4 way stop course and then a roundabout course. They used a bunch of drivers and did two 15 minute tests of each course counting the number of cars that got through and averaged them. The roundabout was a 20 percent improvement over the 4 way stop. And even though they let the drivers practice a bit on the roundabout before the tests they were American drivers that for the most part don't have the day to day experience that European drivers do with roundabouts so I am thinking the efficiency of the roundabout is even greater.