No Stops to Chamberlain, S. Dak.

One of the delights offered by the expanding U.S. Interstate Highway Sys tem is the prospect of vast stretches of highway, completely free of intersections and traffic lights. The ultimate —coast to coast without a red light — will not be possible until 1972. But right now, the American Automobile Association announces, a driver can wheel onto the Massachusetts Turnpike in downtown Boston, go on to pick up the New York Thruway (Interstate 90), continue through Pennsylvania to Interstate 71 leading to the Ohio Turnpike and Indiana Toll Road (both posted Interstate 80/90), then, using the recently completed Chicago bypass, proceed on Interstate 80 to the outskirts of Council Bluffs, Iowa, join Interstate 29 to Sioux Falls, S. Dak., and then back on Interstate 90 to Chamberlain, S. Dak. — all without a stoplight. Total distance: 1,802 mi. Total tolls: $15.35.

Time to make the trip (driving ten hours a day): three days, v. four days a decade ago.