BS. The problem isn't the high speeds, it's the differential in speeds (and corresponding backup) that are created by 1) artificially low speed limits, and 2) constantly changing speed limits.
As for semi-trucks, they should be restricted to the two right hand lanes on a three lane road. I believe this is the case for most of the US interstate system that has 3 lanes.
I totally agree.....and all cars should be relegated to the left lane. Too many morons driving 50mph in middle lane.
You are absolutely correct that differential speed is the most important factor other than drunk and/or substance-impaired drivers in the number of accidents.