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- "The National System of Interstate and Defense Highways," 1964 - The Interstate Highway System includes more than 48,000 miles of controlled-access roadways spanning the United States. Championed by President Dwight D. Eisenhower, the system was authorized by the Federal-Aid Highway Act of 1956. The network as originally envisioned was completed in 1992, but expansions continue. It remains the largest public works project in history.

- 1964
- Collections - Artifact
"The National System of Interstate and Defense Highways," 1964
The Interstate Highway System includes more than 48,000 miles of controlled-access roadways spanning the United States. Championed by President Dwight D. Eisenhower, the system was authorized by the Federal-Aid Highway Act of 1956. The network as originally envisioned was completed in 1992, but expansions continue. It remains the largest public works project in history.
- "This Concrete Road," Portland Cement Association, 1918 - As trucking increased during World War I, paved road became essential. This advertisement from the Portland Cement Association promoted concrete roads that would hold up under the heavy loads.

- 1918
- Collections - Artifact
"This Concrete Road," Portland Cement Association, 1918
As trucking increased during World War I, paved road became essential. This advertisement from the Portland Cement Association promoted concrete roads that would hold up under the heavy loads.
- Portland Cement Association Advertisement Promoting Good Roads "Concrete Roads and Lettuce Salad," April 1919 - The Portland Cement Association, a trade group promoting the use of Portland cement, published this advertisement in 1919 to support road improvements. The ad used the example of fresh lettuce, stating that it could be delivered more economically over paved highways versus dirt roads. Of course, cement producers stood to profit from the construction of paved roads.

- April 01, 1919
- Collections - Artifact
Portland Cement Association Advertisement Promoting Good Roads "Concrete Roads and Lettuce Salad," April 1919
The Portland Cement Association, a trade group promoting the use of Portland cement, published this advertisement in 1919 to support road improvements. The ad used the example of fresh lettuce, stating that it could be delivered more economically over paved highways versus dirt roads. Of course, cement producers stood to profit from the construction of paved roads.