The rear wheels of the truck possibly cut the corner - this is unfortunately a characteristic of any four-wheeled vehicle - the front wheels follow the curve, the rear wheels follow on by the shortest route - but it's exacerbated by vehicle length and articulation. The most obvious example is when a truck is making a 90-degree right turn - the front wheels make the turn, and the rear wheels cut the corners, often mounting the sidewalk in the process. Being on the inside of a turn when a larger vehicle is turning is the "death zone" for cyclists. Of course, getting drivers to stay in lane is also an uphill battle - one of the most annoying things to me as a cyclist is the seeming unwillingness or inability of drivers to stay in lane - they drift over into the bike lane on sweeping right bends, and into the outside lane on left curves. Where I was raised and learned to drive, improper "lane positioning" (ie, not being in the centre of the lane any time you weren't actively turning) cost you a driving test and sometimes a ticket.
Last edited by Litespud; 08-20-20 at 01:18 PM.