How fast do cars straighten up after a corner?

Cars tend to corner quickest with the tail hanging out a little rather than running inline with the slot.  The cars don't straighten up immediately after a corner.  Tire  rubber is laid down on the track after extensive use. The position of  rubber on the track shows where the cars have been running. Here's some photos showing how long the cars take to straighten up. 

The corner (left of the picture) is about 52cm / 20½ inch radius on the outside lane.  The cars have straightened up by the right of the picture.  The 1 foot (approx 30cm) ruler gives an idea of the scale.  In this example it is taking about 35cm/ 14 inches for the cars to straighten up. (The surface is MDF and the braids are copper, so there is no magnet traction effect)

Here's a similar shot of the exit to a larger radius corner  - about 101cm / 40½ inch radius on the outside lane.   In this example it is taking about 45cm/ 18 inches for the cars to straighten up.