[Implemented] Add Rockingham (Corby) to the Track Rotation?

[Tommer]

So the problems people brought up in the thread are as follows

1. People simply just keep driving around the oval
2. People find the inside straights too short
3. Sirens never disappear

Here's the solutions I suggest

1. Make most of the Oval OOB

This will solve people just going around the oval. If you shift+U and view the inside track, it's actually quite an interesting layout for cops and robbers without the oval

2. Allow only TBO performance level cars or slower

Slower cars will make the track feel more spacious and it also gives the track a unique selling point as it's a chance for us to play with TBO cars without getting a disadvantage against other players

3. Decrease siren distance on Rockingham

The cars will be travelling slower if they are TBO anyway, so having shorter siren distances will be fine and solve the siren problem.