Some 40,000 roadbuilders gathered in Chicago last week for a look at the spectacular new machines they will need for the 13-year, $100 billion federal-state highway program. They will need plenty—an estimated $1,350,000,000 worth of new equipment by 1960, 45% more than they have now.

Among the new machines:

¶ Mixermobile Manufacturers' huge-mawed "Scoopmobile," one of the largest tractor scoops in production, which takes six to eight cu. yds. of earth and rock per load. Price: $50,000.

¶ Buffalo-Springfield Roller Co.'s 16-ton ''Kompactor," which packs roads by exerting 480 lbs. of pressure per sq. in. with its four giant roller wheels....

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