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One type of roundabout design starting to gain traction in the United States is the mini roundabout, which features a reduced diameter (50 to 90 feet) with a traversable central island, allowing buses and trucks to travel over the top of it. Passenger vehicles are expected to use the circular roadway around the central island.Read More »
Captured in Google Earth, this 1-mile stretch of West Main Street in Carmel, Indiana, has seven roundabouts lined up, with three more just to the south. The city of about 85,000 people has close to 100 roundabouts, which is one of the highest concentrations of roundabouts in the United States. By Kevin Kuhlow, PE Transportation… Read More »
How to Design Roundabout Plantings That Are Healthy all Year Don’t compact the soil. Provide soil that stands up to road salt. Pick plants suited to dry conditions. Plant thick to fight weeds. Water faithfully throughout the first growing season. The center area of a roundabout can turn into a weedy, underdeveloped island. The… Read More »