1- Asphalt
2- Concrete
3- Curbs
4- Grass
5- Dirt (makes dust!)
6- Gravel (makes dust!)
7- Banking (makes dust!)
8- Some sort of very vicious surface, probably was intended to be water.
10- Left-most wall
2048+ - a wall that you can crash into - e.g. armco, hedge, brick wall etc.
2048 - Drive through (grass verges etc)
2049 - Very hard, armco, etc.
2050 - Same as 2049
2051 - Soft, 'elastic'
2052 - Like 2051, but not as 'elastic'
2053 - Soft, hay bales
2054 - Soft, car sinks into (hedge?)
2055 - Soft, softer than 2054
2056 - Hard, not metal, cars bounces off a bit
2057 - Hard, metal, armco
2058 - Soft - hay bales
2059 - Hard, metal, armco
2060 - Bouncy rubber
2061+ -Drive through