Global InformationLouisiana Highway 18 information
Louisiana Highway 18 | ||||
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| Route information | ||||
| Maintained by Louisiana DOTD | ||||
| Length | 79.7 mi[1] (128.3 km) | |||
| Existed | 1955 renumbering–present | |||
| Major junctions | ||||
| West end |   LA 1 / LA 3089 in Donaldsonville | |||
 LA 20 in North Vacherie
 LA 3017 in Harvey | ||||
| East end |     US 90 Bus. / Future I-49 / LA 23 in Gretna | |||
| Location | ||||
| Country | United States | |||
| State | Louisiana | |||
| Parishes | Ascension, St. James, St. John the Baptist, St. Charles, Jefferson | |||
| Highway system | ||||
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Louisiana Highway 18 (LA 18) is a state highway that serves Ascension, St. James, St. John the Baptist, St. Charles, and Jefferson Parishes. Called the Great River Road, it runs from west to east, parallel to the west bank of the Mississippi River, running from Donaldsonville to Gretna. It spans a total of 79.7 miles (128.3 km).[1] In the more rural parts of LA 18's span, it is commonly referred to as River Road, but it becomes 4th Street once it enters Westwego.
- ^ a b Microsoft; Nokia (November 5, 2012). "Map of LA 18 and Auxiliary Route(s)" (Map). Bing Maps. Microsoft. Retrieved November 5, 2012.