Instead of using blocking collision, use overlapping. You did not mention what is supposed to happen with hit objects.
Or, if you want to keep the physics simulation, you could Constraint car movement direction to whichever axis you need. You can find it in the Physics panel of the car static mesh. If you Lock Y Position, the physics simulation should not be able to move the car to the sides while you can still reposition the entire actor as you please - I think that’s what you need.