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.
I'm convinced that there isn't a competent traffic engineer in Texas. Not only do they not know their trade, they are completely devoid of common sense.
They design highways without a crown so that the water doesn't run off. They ignore design standards and put in lanes that are too narrow. They dump the off ramps onto wide frontage roads way too close to the intersection, making it impossible to turn right at the intersection that you exited for if there is even moderate traffic. They dump on ramps on top of the next exit ramp, or right before an 'exit only' so you have to cross a lane of traffic to get to a through lane. Or instead of an exit only, they continue a lane until just past an exit, and then end it with little warning.
All university programs in traffic engineering in the state should be stripped of their accreditation, and engineers responsible for fatal car wrecks should be indicted for murder.
rant off.