REDUCTION IN NUMBER AND SEVERITY OF CRASHES
Several features of the modern roundabout promote safety. The safety benefits alone should be enough to convince roundabouts are a great idea. According to a study by the Institute for Highway Safety of locations where stop signs or traffic lights were replaced by roundabouts, all crashes were reduced by 37 percent and serious crashes fell by 75 percent, including a 90 percent reduction in fatalities. This means not only fewer crashes, but also most will be able to walk away from them.
At traditional intersections, some of the most common types of crashes are right-angle, left-turn, and head-on collisions. These types of collisions can be severe because vehicles may be traveling through the intersection at high speeds to "beat the red light." With roundabouts, these types of potentially serious crashes essentially are eliminated because vehicles travel in the same direction.
ACCIDENT RISK AND SEVERITY
Installing roundabouts in place of traffic signals can also reduce the likelihood of rear-end crashes by reducing abrupt stops at red lights. The vehicle-to-vehicle conflicts that occur at roundabouts generally involve a vehicle merging into the circular roadway, with both vehicles traveling at low speeds – generally less than 25 mph in urban areas.
|A traditional intersection has 32 potential conflict points
||A roundabout has only 8 potential conflict points
SINGLE LANE ROUNDABOUTS
The most common type of roundabout in Lincoln is a single-lane roundabout. As you approach a roundabout there will be a YIELD sign and there may be a dashed yield line. Slow down, watch for pedestrians and bicyclists, and be prepared to stop if necessary. If another car is waiting ahead of you, do not stop in the crosswalk. When you enter, yield to circulating traffic on the left, but do not stop if it is clear.
A conventional roundabout will have ONE-WAY signs or directional arrows mounted in the center island. They help guide traffic and indicate that you must drive to the right of the center island. Upon passing the street prior to your exit, turn on your right turn signal and watch for pedestrians and bicyclists as you exit. Left turns and U-turns are completed by traveling around the center island.