I have got a big problem with driving cars.
It need several hours to find all parts to repair a car.
If you drive it then, the game is not able to load the map and update your position.
Every minute you have a still screen for about 10 seconds and you cannot control the car in these 10 seconds.
It drives somewhere and crashes.

The internet connection cannot be the reason for this problem (140MBit upload, 30MBit download).

Please make driving cars on PS4 more comfortable.