Depends on which problem space around cars we're talking about. Are we talking about the vehicles themselves? Then those aren't referred to by nerds in colloquial usage.
That being said, there are a lot of nerds who obsess about things like highway systems, road planning and the like. There's also the electric car space, the AV space, etc.
That being said, there are a lot of nerds who obsess about things like highway systems, road planning and the like. There's also the electric car space, the AV space, etc.