I think transport hubs would be fun like an airpot or a few subway stations maby even a port I alwas imagend Windenburg & Brindleton Bay, as islands El Salvidor is obvously in a diffrent country. he...
I like your idea. I was just thinking about that the other day! It would be nice to have planes, trains, buses and subways! And cars of course. The sims could even get moodlets like "pleasant trip", "smelly place" (in the subway, I live in Paris, so trust me on that), or anything else.