r29392 replaces all the street overlay TGAs with PNG files to cut their file size in half. I don't know why I was using TGAs. I think I remember some period a while ago having trouble blending a PNG, but it was probably just me being stupid.
Anyway, if people could please be on the lookout for any mistakes I made. This was a rather mindless piece of work so it's likely I may have messed up a few. Just check if you see any obvious problems between the textures, or if something's got the wrong street lines painted on it, etc. Thanks.