Are tractor/trailers the problem? I thought the big 3 and 4 axle rigids (tippers, concrete mixers etc.) were the ones killing cyclists.
That makes sense if rear wheels cutting corners is a significant part of the problem, because the rear axles on long rigids do that even more than articulated trailers. (I don't think it's the whole of the problem - suspect poor visibility and blind spots are more significant.) Steered rear axles would help here too, and again would pay back in other ways too. The 'driving force' for such a change could come from extending construction site health & safety law to the full impact of the construction.
That makes sense if rear wheels cutting corners is a significant part of the problem, because the rear axles on long rigids do that even more than articulated trailers. (I don't think it's the whole of the problem - suspect poor visibility and blind spots are more significant.) Steered rear axles would help here too, and again would pay back in other ways too. The 'driving force' for such a change could come from extending construction site health & safety law to the full impact of the construction.