HL Deb 29 July 1982 vol 434 c440WA
The Marquess of Ailesbury

asked Her Majesty's Government:

What legal offence is committed by a motorist who halts on a "yellow box junction".

The Earl of Avon

It is an offence to stop on the area of a junction duly marked with a yellow box, except when the vehicle concerned is turning right and is only prevented from completing the turn by oncoming traffic or other stationary right turning vehicles. The offence is non-compliance with a prohibition imposed by a Traffic Regulation Order made under Section 1 (or in Greater London, Section 6) of the Road Traffic Regulation Act 1967.