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- "Toll Gate, Turnpike Movements, Telford Road System, McAdam Road System" - In the 19th century, road improvements in the United States tended to be private efforts financed by investors and supported by tolls. This illustration shows two methods of road construction. The Telford system used a base layer of stone blocks and an upper layer of smaller interlocking stones to support the road surface. Macadam (or McAdam) roads eliminated the stone-block foundation.
- 1850-1900
- Collections - Artifact
"Toll Gate, Turnpike Movements, Telford Road System, McAdam Road System"
In the 19th century, road improvements in the United States tended to be private efforts financed by investors and supported by tolls. This illustration shows two methods of road construction. The Telford system used a base layer of stone blocks and an upper layer of smaller interlocking stones to support the road surface. Macadam (or McAdam) roads eliminated the stone-block foundation.
- Major Maintenance Study for the Edison Institute, Dearborn, Michigan, November 1979 -
- November 01, 1979
- Collections - Artifact
Major Maintenance Study for the Edison Institute, Dearborn, Michigan, November 1979