I commute to DIA several times a month from Ft. Collins. Taking Hwy7 through Brighton over to Tower Rd. takes 10 to 15 minutes longer. A few years ago Adams County installed traffic lights at every intersection along Tower Road to "influence" people to use 470. THAT was a scam finally uncovered and rectified.
On rare occasions I find the cost worth the time saved but it's more often due to my lack of self discipline to leave home when I need to.
Save a few bucks or a few minutes.