Jason Katz-Brown said the most reassuring sight when he’s rollerblading down a mountainside at 30 miles per hour is a tractor-trailer passing him going twice as fast. Truckers know the roads and a truck moving at a fast clip is an indication of clear, straight stretches ahead, Katz-Brown said in an interview last week after skating into town on July 4 from Anchorage.
He made the 750-mile trip in 17…