The Sam Houston Tollway around Houston would be the example you don't want to acknowledge.
Dog Gone, you can provide facts AND read my mind. That's an amazing skill you have there.
Now for the next question: why is there such a great need for people to live dozens of miles away from their work (and commute)?
I'm not saying it's a simple issue, but toll roads are an exepensive band aid, at best.
Westpark is a a good example, Sam Houston isn't. It's funny you say it alleviates congestion, since the only time there are very many people on it at once is during the frequent accidents at the toll booths.
I used to work off it. I tried it a few times and wound up just taking the frontage road.