The A16 road is a principal road of Lincolnshire in the East Midlands region of England, connecting the port of Grimsby and Peterborough, where it meets the A1175, A47 & A1139 then on to the A1 and the A605; the latter, in turn, giving a through route to Northampton and the west, and south west of England. Its length is 78 miles (126 km). The road was "de-trunked", with responsibility largely returned to Lincolnshire County Council from the Highways Agency in 2002. From north to south its route is: The road is a Primary Route for its entire length.Most of the A16 is single carriageway.