In the typical suburb there is enough density for a good static network to work. Note that I said "good", and "network". A suburb cannot support a bus every hour, the service is too bad - but it can support a bus every 10 minutes or better because the service is acceptable. Also: network, not route - the important part is you need to be able to get to all the places you would normally go and that means the entire network matters and the ability to quickly/easially transfer to other routes is critical to success.
Also we should not assume only the bus. A train is a useful part of any large transport network. There should be a train between Dallas and Fort Worth that makes the trip in 10 minutes - you can't do that in a car (a race car with a professional driver could beat that if we block all traffic, but no normal car or driver can even if traffic is blocked). Sure the current train takes an hour, but we can make is faster with existing technology.
I really think this is completely wrong. You will convince approximately 0 people in Dallas to use a bus if this is what you are offering them.