BOSTON'S $110,000,000 HIGHWAY IN THE SKIES:
92,000 TONS OF STEEL, 459,000 TONS OF CONCRETE AND THE WIDEST VEHICULAR TUNNEL IN THE WORLD TO SMASH THE CITY'S TRAFFIC BOTTLENECK
How soon can we use it? That's the question most folks ask about the Central Boston Artery.
Then come questions about size, where it starts and ends, how many motor vehicles will use it, why its unique among Massachusetts highways and unusual anyway.
During recent months, the most spectacular part, construction of the towering steel skeleton of the elevated half of the highway, has been watched by scores of thousands in downtown Boston. . . .
How many vehicles can it carry comfortably?
About 90,000 every twenty-four hours, approximately 45,000 in each direction. Many, maybe a majority, will use only part of the expressway. They'll be men and women working or shopping in downtown Boston or truck drivers delivering or picking up loads there. They'll leave the expressway or come onto it by ramps.Boston Sunday Globe Magazine, August 8, 1954, pp.1-2