Car and character falling through bridge

My car and character keep on falling through the bridge.

The character and car work fine on flat road but if I try to climb the bridge, they fall through the bridge. I have the Box Collider and Rigid Body on them but they still fall.

What can I do to prevent this?

  1. The bridge itself should also have a Collider.
  2. The character should have a Rigid body & Collider or Character Controller.
  3. Your car should have a Rigid body and a Collider

Shouldn’t be possible to fall now.