-Two new roundabouts at the U.S. 1 interchange (Exit 71) in Sanford near the Northview Crossing Shopping Center are open for business in Sanford. The interchange traffic pattern was changed after a series of frontal impact crashes at the intersection of U.S. 15/501 (Hawkins Avenue) at the northbound and southbound ramps and the intersection of U.S. 15/501 and Amos Bridges Road. It was determined these improvements were needed to address the safety of the road for motorists.Paving and lane striping on the roundabouts wrapped up late last week, allowing them to be opened. These new roundabouts are circular intersections that channel traffic around a center island without using traffic signals. Because roundabouts allow for continuous flow, they let vehicles pass through the intersection more efficiently than traditional intersections. This will not only reduce congestion, but also cuts down on pollution and fuel use. In addition, roundabouts are proven to reduce accidents when compared to signalized intersections. These are single lane roundabouts, so approaching motorists need to yield to vehicles already in the roundabout, as they have the right of way. Drivers should use their turn signal when preparing to exit a roundabout, and always be cautious and look for unexpected vehicles, pedestrians or bicycles.Tractor trailers are able to use the roundabout by letting their left side trailer tires ride up on the "truck apron", which is the raised concrete portion of the interior island so they can go around to the exit.For real-time travel information at any time, visit the Traveler Services section of the NCDOT website or follow NCDOT on Twitter. You can also access NCDOT Mobile, a version of the NCDOT website especially for mobile devices. Visit m.ncdot.gov from your mobile browser.