I made the sojourn from San Antonio back to DFW over Memorial Day Weekend....people on I-35 have no concept as to what a passing lane is for.
No kidding. Some of them are left-lane vigilantes too.
I suspect the problem is that I-35 is so dang narrow that no one would get anywere on time if people stayed in the right lane except to pass though.
I hate that drive, especially the DFW-Austin section.
The engineers who originally designed I-35 through Austin had no clue what they were doing. The right of way should have been at least twice as wide as it is. It was originally 2 lanes each direction with no space to add another lane each direction at ground level. Then they compounded the mistake by building additional elevated lanes that only have 2 lanes each direction.