Texas State Highway 100

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.

State Highway 100
Route information
Maintained by TxDOT
Length24.61 mi[1] (39.61 km)
Existed1924[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
Highway system
← SH 99SH 101 →

History

SH 100 was designated on September 15, 1924 on most of its current routing in Deep South Texas, but it ended at Gomez Street in Port Isabel.[3] Since its initial construction, the only two changes in the routing was on January 23, 1975, when SH 100 extended east 0.5 miles replacing the section of PR 100 from Gomez Street to the western end of the Queen Isabella Causeway, and that SH 100 was rerouted the city of Port Isabel, where the route was transferred to separate one way surface streets to better handle flow onto the Queen Isabella Causeway

Route description

SH 100 begins at an intersection with Interstate 69E/U.S. Route 77/U.S. Route 83 and Farm to Market Road 1421 at unincorporated Russelltown (formerly known as Barreda). The route travels due east, passing through downtown Los Fresnos. The route continues east before turning northeast where it formerly met Old Port Isabel Road, which connected Brownsville and Port Isabel. At this point the route becomes a 4-lane divided highway. The route continues northeast and east around the northern edge of Bahia Grande before reaching the southmost edge of Laguna Vista. The route then turns southeast, running along the coast of the Laguna Madre. Continuing southeast, it passes through the town of Laguna Heights, before reaching the city of Port Isabel. It reaches its eastern terminus at the Queen Isabella Causeway, which continues across the Laguna Madre to South Padre Island as Texas Park Road 100.

Junction list

The entire route is in Cameron County.

Locationmi[4]kmDestinationsNotes
Brownsville0.00.0 FM 1421 south (Rice Tract Road) / I-69E / US 77 / US 83Western terminus; interchange; I-69E exit 14
3.55.6 FM 803 (Olmito North Road)
​5.18.2 FM 1575 (Old Alice Road)
Los Fresnos6.510.5 FM 1847 (Arroyo Boulevard)
Laguna Vista19.130.7 FM 510 (Santa Isabel Boulevard)
Port Isabel23.137.2 SH 48 west (Brownsville-Port Isabel Highway) – BrownsvilleEastern terminus of SH 48
Laguna MadreQueen Isabella Causeway
South Padre Island24.639.6 PR 100 (Padre Boulevard) – Schlitterbahn Beach WaterparkEastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
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References
KML is from Wikidata
  1. Transportation Planning and Programming Division (n.d.). "State Highway No. 100". Highway Designation Files. Texas Department of Transportation.
  2. 1926 highway map
  3. (PDF) https://publicdocs.txdot.gov/minord/MinuteOrderDocLib/003676892.pdf. Missing or empty |title= (help)
  4. Google (August 29, 2014). "Texas State Highway 100" (Map). Google Maps. Google. Retrieved August 29, 2014.
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