asked Her Majesty's Government:

What steps they are taking to ensure that non-English-speaking road users can read road signs. [HL3377]

Traffic signs prescribed in the Traffic Signs Regulations and General Directions 2002, already conform to international standards set in the 1968 Vienna Convention on Road Traffic, and the subsequent 1971 European Agreement. These standards adopted a system of pictorial traffic signing, to maximise driver understanding across international boundaries.

We continue to develop pictorial signing solutions to specific problems as they arise; a recent example being a sign alerting drivers of unsuitable routes for heavy goods vehicles. Highway authorities may apply to the Department for Transport to use this non-prescribed sign where necessary.