M74 in the Motorway alphabet
The font Motorway alphabet
appears on road signs on motorways in the United Kingdom, and is used for route numbers. It is available in two weights: Motorway Permanent is the standard weight, and is used for pale text on a dark background (i.e. white-on-blue permanent motorway signs) while Motorway Temporary is heavier, and is used for dark text on a pale background (i.e. black-on-yellow temporary motorway signs).
The Motorway alphabet was created in the 1960s by designers Jock Kinneir and Margaret Calvert, as part of a wider-ranging remit to design motorway signage.
All other text on UK road signs appears in Transport.