From PsychoSquad: “Cyberpunk 2077 is a big game, with Night City and the Badlands covering an approximate area in the ballpark of 100km2. Even though the future of 2077 offers all kinds of fancy vehicles and even augmented legs to get around quicker than usual, sometimes you’re just not interested in sightseeing.”
Source: N4G PC Cyberpunk 2077 Fast Travel Guide – How To Travel Quickly Through Night City