Portland Concrete Highways original vintage advertisement. No
pavement could be stronger even if carved from solid rock! With
of the Mark Twain Expressway, Interstate 70 approaching the Terminal
Building at the Lambert - St. Louis Municipal Airport, St. Louis,
Missouri. Built of new type concrete, the expressway will cut
the trip to the airport from 40 minutes to 20 minutes! In cities
everywhere, new express routes that end traffic jams are a big
part of the Interstate System planning.