[MHGinTN]

Sounds to me like a man whose accelerator was stuck ‘down’. The bomb might have been placed in order to end the racing car before it did too much damage to the city/populace. I would guess a remote detonator was used and someone was timing when to detonate the speeding vehicle IF there was a bomb which separated the motor and transmission from the chasis.

[libstripper]

Why not turn off the ignition and shift the vehicle into neutral?

[Cicero]

Sounds to me like a man whose accelerator was stuck ‘down’.

That was my thought, too. I doubt whether they would use a bomb or a drone. The damage would be too obvious and hard to cover up. But it wouldn't be hard to tamper with the car while he was away from it doing something else, and fix it so it would suddenly accelerate and not respond to the brakes.

[Clump]

I get the feeling he had no ability to stop the car when he was going through the lights.
He must has been terrified going at such speeds knowing he was powerless to slow down or come to a controlled stop.
We will never know the true story just like so many others.