sentences:  Rainworth is now bypassed, and the former route is the B6020.The eastern end of the bypass crosses a former railway, and meets the B6020 at a roundabout, where the dual carriageway begins, close to the JET "Python Hill Service Station" on the B6020.The main characteristic of this dual-carriageway, heavily-landscaped bypass is that it was obviously built in anticipation of a similar (dual-carriageway) bypass of Mansfield, which although planned, never arose, and was built as single carriageway instead.