Like David Amerson, I don't drive above about 70 mph when towing, even if the posted speed is above that. A setting for maximum speed in the profile would be helpful, but only if it's used in the calculation of travel time.

As mentioned by Candace Terry, when towing my travel trailer, I limit my speed to ~68mph on interstates and other limited access hwys. Otherwise, I generally follow the posted speed (assuming it's<70).

For routes in the plains and southwest, much of the route likely uses hwys with posted speeds of 75-85mph. This could lead to unrealistic arrival time.

That would be especially helpful when your trailering something.

YES PLEASE!

It would be far better for each "leg" to automatically be timed to the speed limit over that stretch of road, perhaps modified by the driver's choice of "slow, average, or 'leadfoot'" or somesuch.

this would very helpful