You don't - it's AGT... not everything needs level crossings!
To clarify: It's better to have higher-order transit either elevated or underground, because it's safer, and faster. Light Rail is the cheapest entry into the "Rapid Transit" foray, but with that you get all the mess that goes along with interfacing with other ground users - like it can't go as fast, and you'll have injuries and deaths from collisions.
To clarify: It's better to have higher-order transit either elevated or underground, because it's safer, and faster. Light Rail is the cheapest entry into the "Rapid Transit" foray, but with that you get all the mess that goes along with interfacing with other ground users - like it can't go as fast, and you'll have injuries and deaths from collisions.