What is the affect of he tilt degree of a ramp on the speed of a toy car rolling down it?

What is the affect of he tilt degree of a ramp on the speed of a toy car rolling down it?
Just like in the construction of Super Speedways for professional race car use, the incorporation of a tilted or banked turn allows the car to maintain higher speeds throughout the turns of the course. The forces that act upon a vehicle as it is turning at high speeds causes the car to experience a phenomenon known as under-steering, that is, the tendency of the vehicle to want to continue driving in a straight line instead of turning due to the forces acting upon the vehicle and the inability of tire traction to compensate for these forces. Race car drivers will have to use more braking to slow the car to acceptable speeds in order to establish enough traction to maneuver the turn on a flat track. However, if the track is banked, this will reduce the severity of forces acting upon the vehicle and reduce the amount of traction required to hold the car in a turn, resulting in less braking required, thus, higher speeds throughout the entire turn. Since a toy car does not have brakes, it cannot slow down, and if the turn is too tight and not banked, the toy car will simply fly off the track because of the under-steering phenomenon.