SuperCruise

I just did a substantial road trip.  About 6 hours of driving, much of it at 75-90 mph using SuperCruise.  A few interesting discoveries thst I class as nice surprises.

1. Speed set at 80 but the road curved and slowed to about 72 to compensate for curve.

2. Even at 85 and 90 SuperCruise still sets speed.  It seems to trust me more than state speed limit.

3. I needed to pass on a 2 lane road.  In Oregon, i passed on a two-lane road.  This required putting my foot down.  The 75-100 mph transition is startling fast with some lovely exhaust notes as it upshifts through several gears.  (The supposed governor-limited top speed off 154 seems entirely plausible.  It also seem a bit stable at speed than my 2000 Corvette which often became a little light in front above 100.)  Somewhere after 100, SuperCruise shut off.  This was no big deal because I was paying very careful attention at this speed moving back into lane.  This seems like a reasonable action.

The next pass was in Nevada and again the pass (in this case two semis) ended above 100 but SuperCruise remained in effect.  Perhaps because Nevada has posted speed limits of 80.  Oregon tops out at 70.  SuperCruise may figure that there are legitimate reasons for you still be in SuperCruise mode some 25 mph above maximum posted speed for situations like this.