BBC Panorama last night, and reported this morning in many papers (here is but one -
https://www.theguardian.com/politics/2020/jan/27/highways-englands-smart-motorways-policy-killed-drivers-exminister )
looks like the minister signed off on the evidence of a trial, and Highways England then went off and implemented the roll-out on the cheap with emergency laybys 3 times further apart than the trial, and (apart from 6% of the total) without the vehicle detection radar the system was meant to come with. Panorama showed a collection of video-ed near-misses which were of the most hair raising!
With road building now being something of an environmental anathema "smart" motorways was possibly the only option available in the fight against congestion. with 300 miles more currently being converted, what would be the sensible thing to do now - cancel HS2 and use the budget to do a proper job this time?