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- Toll Gate on Mill Road and Grand River Avenue, Detroit, Michigan, 1900-1915 - Continuing a practice dating to the late 1700s, some entrepreneurs charged tolls for privately maintained roads. Here, a horse-drawn vehicle lines up behind an automobile at a toll gate in early 20th-century Detroit. Few of these improvised toll roads turned a profit.

- 1900-1915
- Collections - Artifact
Toll Gate on Mill Road and Grand River Avenue, Detroit, Michigan, 1900-1915
Continuing a practice dating to the late 1700s, some entrepreneurs charged tolls for privately maintained roads. Here, a horse-drawn vehicle lines up behind an automobile at a toll gate in early 20th-century Detroit. Few of these improvised toll roads turned a profit.
- "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.
- Toll Rates Sign from the Keokuk & Hamilton Bridge Spanning the Mississippi River, 1868-1869 - Andrew Carnegie's Keystone Bridge Company built the first Keokuk and Hamilton Bridge in the late 1860s, which stood until 1915 when the threat of a competing bridge forced the owners to reconstruct the deteriorating structure. The toll rates provided the bridge owners with the money to perform maintenance and major repairs to ensure the safety of the structure.

- 1868-1869
- Collections - Artifact
Toll Rates Sign from the Keokuk & Hamilton Bridge Spanning the Mississippi River, 1868-1869
Andrew Carnegie's Keystone Bridge Company built the first Keokuk and Hamilton Bridge in the late 1860s, which stood until 1915 when the threat of a competing bridge forced the owners to reconstruct the deteriorating structure. The toll rates provided the bridge owners with the money to perform maintenance and major repairs to ensure the safety of the structure.
- Grand River Tollgate, Michigan, circa 1890 - Continuing a practice dating to the late 1700s, some entrepreneurs charged tolls for privately maintained roads. This makeshift toll gate stood at Grand River and Snyder roads in Michigan near the turn of the 20th century. Few of these improvised toll roads turned a profit.

- circa 1890
- Collections - Artifact
Grand River Tollgate, Michigan, circa 1890
Continuing a practice dating to the late 1700s, some entrepreneurs charged tolls for privately maintained roads. This makeshift toll gate stood at Grand River and Snyder roads in Michigan near the turn of the 20th century. Few of these improvised toll roads turned a profit.