Suburban People Movers

When you live in the suburbs, being green when it comes to transportation is more of a challenge than in the city, where mass transit systems have existed for years. So I was thinking, what might a system look like in the suburbs? There may not be enough volume to keep a regular schedule of trains. Buses are unsightly and need drivers. So what if you had something that was a cross between a horizontal elevator and a monorail? I like monorails because 1) some say they are cheaper than trains; 2) they look cool and modern; 3) elevating them isn't too hard or unsightly. Here's what it could look like. You have a circuit that goes from the densest population areas, such as apartment complexes or small-lot neighborhoods, to the business and municipal areas of town (library, town offices, senior center). But there is no regular schedule. Instead, when you need to go somewhere, you press a "call" button to summon the car. It may or may not have others on it, going in the same direction. It may take a few minutes, but you have to wait for the next subway train - it's just what you do with mass transit. If it's a light day, the car may even be waiting for you when you want to go home. You could have a pass - an electronic card with your account on it - for payment. The car could hold maybe 8-10 people. The whole thing would run without a driver. (Hence the elevated part - although you'd probably still need some sort of collision avoidance system, in case someone got up onto the rail.)
This way, you could travel around without a car in the suburbs - a least some of the time.