Green T and McIngvale are main roads, but are still 2-lane. McIngvale especially has quite a lot of traffic, very hilly, and no shoulder in most places. Hence going through the neighborhoods.
This is a small town, and I live in the next small town to the north. Almost all "main" roads with the most traffic are still 2-lane roads. I feel very much unsafe trying to pound my way up a hill at under 10 MPH when it's a 2-lane road and no shoulder. I don't commute, at least not at this point, because of the types of roads and because of the 14.5 mile distance that would take me at least 75 minutes each way, and I don't want to spend that much time on the bike in the dark, not at this time of year anyway.
Almost all the main thoroughfares around here, and EVERY connection between the towns where I work and live look like this (aside form the interstate):
http://maps.google.com/maps?hl=en&ll...2,5.29,,0,2.95
Doesn't look like that many cars there, but trust me there are plenty, and the traffic usually is doing 50+