Either my copy is acting screwy or there's a bug in the Total Time calc for Routes in the new 5.15.3 version. I've verified this with another user so I don't think it's my copy/system.
Under Driving Speeds, my Interstate Highway is the fastest at 67mph so we're good here....
But on a 160 mile trip it calaulates 1:57:04 for my trip time (82mph average speed)
and on a 782 mile trip it calculates 8:53:31 for my trip time (88mph average speed)
anyone else seeing this?