It is also important to consider insurance implications.

Insurance companies may not pay for negligence, that being the negligence of the airport owner not restoring the runway to acceptable standards between races.

The rubber is impossible to remove, and even if you do, the vulcanized surface is still slippery. The tendency is for the airport to not spend money removing the rubber, to ignore it is there,

This slippery surface is an accident waiting to happen.

Who will be liable when the insurance company says they will not cover the accident. You better know the answer now.