M4 (Closures) Mr. Maxwell-Hyslop asked the Secretary of State for Transport for how long he expects the night-time closures of the M4 between junctions 2 and 3 to last. Mr. Peter Bottomley The westbound carriageway is involved in this essential maintenance work. Its closure is restricted to the hours of 9.30 pm to 6.30 am to minimise inconvenience to travellers. We hope to have the road fully open again from 13 March.