Written question asked by Ranil Jayawardena (Conservative) on Thursday, 29 June 2023, in the House of Commons. It was due for an answer on Monday, 3 July 2023. It was answered by Richard Holden (Conservative) on Wednesday, 5 July 2023 on behalf of the Department for Transport.

M4: Speed Limits

Question: To ask the Secretary of State for Transport, pursuant to the Answer of 5 June 2023 to Question 186909 and 186508 on M4: Speed Limits, if he will make an assessment of the implications for this policy of trends in the level of use of (a) electric cares and (b) Euro V and Euro VI standard cars.

Answer: Our Zero Emission Vehicle Transition is expected to have a transformative effect on air quality right across our country. Over time, this transition to electric vehicles, plus the increasing proportion of newer petrol and diesel vehicles which emit less pollution than older petrol and diesel vehicles, will mean that levels of nitrogen dioxide will continue to fall. Once nitrogen dioxide concentrations meet legal limit values and Government is confident these levels will be maintained without the measure, National Highways will be able to remove the 60mph speed limit introduced to manage poor air quality on the westbound carriageway.

Secondary information

Type: Written question
Reference: 191846
Session: 2022-23
Related items: M4: Speed Limits
Thursday, 1 June 2023
Written questions
House of Commons; M4: Speed Limits
Monday, 5 June 2023
Written questions
House of Commons
Subjects: Cars Speed limits M4
Link: View this Written question on www.parliament.uk