Fictional road numbers

A fictional road number is a road number that does not really exist except in works of fiction.

United Kingdom

If a fictional road number is used in on TV or film, it is blacklisted, meaning it cannot be used in real life for five years.

The Archers, a BBC radio soap opera
Note: These road numbers were obtained from the map of Borsetshire provided by the BBC. [1] Since the county is apparently between Worcestershire and Warwickshire, the numbers in the county should technically begin with a 4 to be in the right "zone", according to the British road numbering scheme.
- A1702
- A1823
- A1829
- A1835
- A1992
- A9110, linking the town of Borchester with the city of Felpersham
- B1900
- B1985
- B3391, running through the village of Ambridge where the series is set
- B3700
- B3770
- B4879
Blott on the Landscape
- M101, featured in the novel by Tom Sharpe
- M399, featured in the 1985 TV version instead of the M101
Thunderbird 6
- M104, used in the 1966 film – in reality, this was part of the M40 motorway that had just been built and not yet opened

Interstate 60, featured in the 2002 film of the same name, directed by Bob Gale
Interstate 570, a new freeway that is built in a fictional script for South Park [2]
Highway 8, runs through the town of Hill Valley in the Back to the Future films
Highway 395, also runs through the town of Hill Valley in the Back to the Future films
Route 401, runs through the town of Springfield in the TV series The Simpsons
Skyway C25, seen in the year 2015 in the film Back to the Future Part II (1989)