If the ride was already considered bumpy at 50mph, with that bracket system, wouldn't 150mph destroy your car's suspension as it was not designed to take those lateral forces mounted on the wheels as illustrated?
Also, wouldn't this cause riders to puke with such bouncing in a long white tunnel all mono colored lighting?
Also, the your car is powering the drive, from what I can see, what if you have front wheel drive?
How will the exhaust fumes be handled?
What is someone's car engine breaks down? What will a chain reaction pileup look like?
How can users along the length of the tunnel escape a car in flames ahead of them?
WHAT IF A STUPID DRUNK PERSON ENGAGES HIS ENGINE IN DRIVE WHILE ON ONE OF THOSE 150mps SKIRTS DERAILING HIMSELF INTO THE TUNNEL STRUCTURE?