Local traffic Highway Reopens After Tractor-Trailer Rollover on 495N in Mansfield The crash wass near exit 31 at Route 140 By Thea DiGiammerino • Published April 20, 2022 • Updated on April 20, 2022 at 6:08 pm NBC10 Boston I-495 northbound in Mansfield has fully reopened after a tractor-trailer rollover Wednesday. The crash caused delays near exit 31 at Route 140. There was no immediate word on any injuries. Stay informed about New England news and weather. Get the NECN app for iOS or Android and pick your alerts.