Estonian local track - Advice needed

[backwardsbanana]

Hey guys. I have stepped out of my comfort zone of making skins, so I decided I should give it a go on making tracks aswell
So far I have been following Aritz's tutorial for complete beginners and I have managed to do the track, some objects, grass and that is kind of it. I need help with making the pit zone that has a different type of tarmac. How should I do the huge pit area ? I know how to make the road that leads from the track to the pit area, but some of the pictures in the tutorial are down at the moment, I am suspecting they are the ones that talk about the pit area. Any help would be awesome.
Here are some pictures of my progress so far.

[LauZzZn]

You could just change the texture in the terrain editor this is what i know and would use. You can resize the uvw map later in 3ds max.