That is ridiculous!  Make one lane one speed, and the other lane in the same direction another speed.  I would like to know who is going to follow that law.  If the speed on the highway is 65 mph, and you are not driving that speed, then you should be in the right lane, but you all pay the same to drive on that road, so you can drive in either lane, and it is not breaking any law.  Use the laws you have, and do not spend more money on signs that read 55 mph in this lane, and 65 mph in the other lane.  Do you actually that people are going to abide by that.  I think not!  I did live in Alaska for 11+ years, and being from the Lower 48, we have the same problems down here.  If the State Troopers do their job, and stop people who are driving with a road rage, there might not be that many accidents.   I have driven the Seward Highway many times, and not a State Trooper in sight.