I carpool with my wife. We work about 2 miles from each other, so this saves time and gas as we can use the commuter lane. The drive is typical suburban for most of the way ... houses, mixed with many strip malls, then changing to mostly office , warehouse and light industrial buildings. We leave at 7am and there is usually a fair amount of traffic (except in the commuter lane). The 12 mile drive usually takes 30 minutes ... sometimes more if we hit red lights. Without the commuter lane the trip is 45 min.
I avoid highways at all cost in the morning. They are usually packed with hard-core / longer-distance commuters who are cranked up on heavy caffeine and are usually doing their makeup or reading the paper while driving ... :lookaroun