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Texas State Highway 100
 State Highway 100 | ||||
|---|---|---|---|---|
 SH 100 highlighted in red | ||||
| Route information | ||||
| Maintained by TxDOT | ||||
| Length | 24.61 mi[1] (39.61 km) | |||
| Existed | 1924[2]–present | |||
| Major junctions | ||||
| West end |     I-69E / US 77 / US 83 / FM 1421 at Russeltown | |||
| East end |  PR 100 at the Queen Isabella Memorial Causeway at Port Isabel | |||
| Location | ||||
| Country | United States | |||
| State | Texas | |||
| Highway system | ||||
| ||||
State Highway 100 (SH 100) is a Texas state highway that runs 24 miles (39 km) between "Russeltown" and Port Isabel. It was designated in 1926 along its current route. Its western terminus is at Interstate 69E/U.S. Highway 77/83 and ends at the western end of the Queen Isabella Memorial Causeway at Port Isabel. The route continues as Texas Park Road 100 east and north to a dead end on South Padre Island.
- ^ Transportation Planning and Programming Division (n.d.). "State Highway No. 100". Highway Designation Files. Texas Department of Transportation.
- ^ 1926 highway map
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