"The design process for the Clearwater Roundabout is ongoing, said Kristine Fife, of Big Sky Public Relations. "Don't expect construction for at least four to five years."

Although public opinion from an informal social media survey is high against roundabouts, roundabouts successfully reduce traffic accidents and fatalities in their locations. Roundabouts keep traffic moving during off-peak times, rather than having a lone car sitting at a red light.

"Speed limits don't get very good compliance," said Bob Vosen, Montana Department of Transportation (MDT) District Supervisor. "It's easy to...