I was just given the opportunity to interview Nils "Anable" Dougan from the Source Racer mod. You may or may not have already played this mod. If not you are welcomed to download it from Here. Although their website is down due to construction they have a very active forum up. You can view that via the link above. This has to be the most insightful interview I have done to date as it goes into detail many aspects of the modification.
Included in the Interview are some screenshots of an upcoming map for beta 3 called "sr_moonbase."
Half-Life Gaming: What do you do when you start to run out of ideas?
Anable: Go play more games! If you are ever unsure of why you started your mod or where it's going, go back and play the games that inspired it. If it's something worth doing, you'll soon remember why.
Half-Life Gaming: Why did you decide to use the Half-Life 2 engine and not Doom 3's engine or others?
Anable: To begin with, Half-Life 2 already had much of the code that we needed to get the mod started. Had we chosen Doom 3 we would have had to create our own vehicle physics and so on. Half-Life 2 is gorgeous, easy to mod, and was begging for a way to race against other people.
Half-Life Gaming: What kind of other Multiplayer modes do you have planned?
Anable: Right now the plan is to simply have the standard racing mode. When get get that working perfectly and exactly the way we want, then we'll begin thinking about other options to add.