Every time I read this my heart breaks for the families. Of course the driver was in his seventies. Of course the police will never question if he took meds forbidding him to operate heavy machinery.
Edit: took it down. Did not see someone fast faster than I I
Or just ensure people actually know how to drive when they get their license and especially more frequently test older folks whose reaction times and vision may have deteriorated significantly. That’d be a lot cheaper and more feasible than redeveloping entire cities. Deal with the problem itself at its root.