Most Useful/ Useless Car feature

[*bfine32*]

I've learned that adaptive cruise control is annoying. The kind that adjusts your speed based on the car in front of you. I was traveling yesterday and had my cruise set on 70 MPH in light traffic. As I loathe dumbasses that ride in the left lane (it's actually illegal in Germany) I stay in the right lane. I was coming up on a Semi and told myself, that once I get closer I will pass. After about a mile I realized I wasn't getting any closer, looked down at my speedometer and I was going 55