10 minutes north of Waterloo, Iowa at Exit 175 for the eye-blink town of Denver, Iowa is a highly patrolled, low visibility long curve with perfect conditions for high numbers of tickets from either northbound or southbound traffic to or from Minnesota via northeast Iowa. Although there is nearly no reason for this unusual level of vigilance (the highway is barely in the city limits), it is obviously a very high source of revenue for this village. It’s particularly irksome for southbounders who have just left a long stretch of single-lane boredom, and tend to stretch it it out a little. The curve makes it particularly difficult to see the patrol car, and it it’s toward the end of the day, and especially if it’s a weekend, it’s about a guarantee you’re gonna be checked. I wouldn’t risk 70 here, but 65 is legal. As far as legal enforcement goes, it’s about as continuous as I’ve seen. The one unorthodox frontage road entrance is another stupid Iowa DOT entry at a curve, and only the insane or elderly locals would think of crossing at the frontage road, but they do, & some of them get creamed there, as they try to beat oncoming traffic at highway speeds just to save 2 seconds of their lives. Rememer it: Denver, Iowa-they patrol it for the money, not your safety.