Change that to median roadway speed, and I'll be on board. Speed limits are too often set by clueless folk for political concerns, rather than by traffic engineers for maximum throughput for a given safety factor.
There should be some allowance for ensuring that the median speeds of adjacent lanes have a good range separation. I can't even count how many times I have seen a tractor-trailer in the left lane at 70 mph passing a tractor-trailer in the right lane at 69 mph, as passenger cars stack up behind them. It creates a dangerous situation that I can only avoid by slowing down or exiting the roadway.
Speed limits should apply only to the rightmost lane, and additional lanes should be between 5 and 15 mph faster than the current speed of traffic in the lane to their right, regardless of their absolute speed. It makes sense, and it would improve traffic flow, but it can't become law because it would be too complicated for cops to enforce.
There should be some allowance for ensuring that the median speeds of adjacent lanes have a good range separation. I can't even count how many times I have seen a tractor-trailer in the left lane at 70 mph passing a tractor-trailer in the right lane at 69 mph, as passenger cars stack up behind them. It creates a dangerous situation that I can only avoid by slowing down or exiting the roadway.
Speed limits should apply only to the rightmost lane, and additional lanes should be between 5 and 15 mph faster than the current speed of traffic in the lane to their right, regardless of their absolute speed. It makes sense, and it would improve traffic flow, but it can't become law because it would be too complicated for cops to enforce.