Using path constraints

I drew a path using the line tool and then a box to follow the path.

Whilst the box was selected I clicked on Animation > Constraints > Path Constraints and then selected the line as the path. This makes the object move along the path. To make the object follow it in a forward direction the follow box has to be selected in the modifier tab. The bank box can be selected to make the object bank around the corners of the path.

This is a simple render of the box following the path. I will experiment with this technique to animate the Aston Martin along the road.