A46 Nettleham to Welton to close overnight for two weeks Starting early February Lincoln Road in Welton. | Photo: LCC A section of the A46 between Nettleham and Welton will be closed overnight for two weeks, starting in early February. This night-time closure will enable reconstruction works to take place between Deepdale Lane in Nettleham and Lincoln Road near Welton. This work will take up to two weeks, with closures starting on Monday, February 1, running overnight from 7pm to 6am during weekdays. The diversion route during this time will be via A46 Nettleham Roundabout / A15 Riseholme Roundabout / A15-A1500 Showground Roundabout / A15-A631 Roundabout (Caenby Corner) / and either the A631 or A1103 back to the A46, and vice versa.