I have an imaginary city that I started sketching out as a kid. In my imagination it is situated in a real-world place, so a few years ago I transferred my sketch into Google My Maps and I tweak it from time to time, like a garden. Thankfully the location is still uninhabited :)

Are there any tools people like to use for this kind of urban dreamscaping? Google My Maps is pretty rudimentary but it's all I know. Games like Sim City don't fit the bill for me because there's too much other stuff going on -- I just want to sketch roads, buildings, transit lines, etc., on top of a map.