Taplow, Buckinghamshire, UK. 29th January, 2026. Mist was clearing on the M4 Smart Motorway at Taplow in Buckinghamshire early this morning, however, 50mph speed restrictions were in place. The Guardian has reported that "Road campaigners and motoring organisations have urged UK government ministers to immediately release a series of “withheld” safety assessments of smart motorways – some dating back to 2022. Campaigners believe the reports from National Highways, which is responsible for England’s motorways, have been suppressed because they cast further doubt on the safety and economic benef

50mph speed limit, accidents, all lanes running, alr motorways, buckinghamshire, cars, cctv monitoring, commons transport committee, corporate manslaughter, department for transport, digital motorways, digital roads, digital upgrade, emergency areas, emergency refuge areas, emergency stop areas, england, fatalities, fog, foggy, gb, great britain, hard shoulder, hard shoulders, highways england, infrastructure, live lanes, lorries, m-road, m-roads, m4, mandatory, motorways, news photos, not-personality, nws, pollution, popes, post-opening project evaluations, queueing traffic, queues, radar, radar based stop vehicle detection, red x violations, road, roads, safety concerns, seasonal weather, seasons, smart motorway, smart motorway deaths, smart motorways, smart motorways kill campaign, speed limit, speed limits, stopped vehicles, svd, taplow, traffic, transport, travel, uk, uk weather, united kingdom, variable speed limits, vehicles, winter, wintertime,