The Texas House of Representatives has already approved changing the maximum speed limit in the state to 85MPH. The bill will now go to the Senate.
If a car maintains the 85MPH pace for two hours they will have driven 170 miles. I am not sure that cars can withstand being driven at that speed for two hours without overheating. It is pushing a car to its limit.
It would also take longer to stop if a car traveling at that rate of speed were to hit another car. For instance a car traveling 85MPH which came up behind a car traveling at 55MPH might not be able to stop in time to avoid a collision.
The higher rate of speed, more importantly would be more likely to result in more fatalities, plus there would be more cars totaled, which would result in higher insurance premiums. The car insurance companies would have to raise the premiums to pay for the damage inflicted by cars going 85MPH.
Another scary thought is the mentality of many drivers, who think they can go five or ten miles over the speed limit. That could mean cars could be driven 90-95MPH on the interstates.
The thought of getting to your destination faster is nice but it is even nicer to drive 70MPH and arrive safely at your destination, with no damage to your vehicle.