Texas State Highway OSR

State Highway OSR
State Highway OSR
Old San Antonio Road
	SH OSR; highlighted in red
Route information
	Maintained by TxDOT
Length	61.918 mi (99.647 km)
Existed	1942–present
Major junctions
West end	SH 21 near Bryan
	US 190 / SH 6 in Benchley ; I-45 near Leona
East end	SH 21 at Midway
Location
Country	United States
State	Texas
Counties	Brazos, Robertson, Leon, Madison
Highway system
	Highways in Texas ; Interstate ; US ; State ; Toll ; Loops ; Spurs ; FM/RM ; Park ; Rec ;

Last updated April 12, 2024

State Highway OSR (SH OSR) is a state highway in the U.S. state of Texas.

The route is the section of the Old San Antonio Road in east-central Texas that is maintained by the Texas Department of Transportation. While most of the original Old San Antonio Road (that is, the section of the road that is not private property) follows State Highway 21, State Highway OSR provides a routing close to the original alignment of the road near and around the Bryan-College Station metropolitan area.^[1]

"OSR" is the only state highway in Texas with a completely alphabetical designation and one of only two where the designation begins with a letter (Texas State Highway NASA Road 1 being the other with a beginning letter).

Route description

Along SH OSR west of Normangee near Interstate 45 TexasStateHighwayOSR-RoadsideSign.jpg — Along SH OSR west of Normangee near Interstate 45

OSR begins at an intersection of SH 21 just east of the Brazos River in Brazos County. It crosses U.S. Highway 190 (US 190) and SH 6 north of Bryan. Just west of this intersection, it begins to run along the county line between Brazos County and Robertson County. Upon crossing the Navasota River, OSR continues as the county line, this time between Leon County and Madison County. It passes through Normangee and crosses Interstate 45 (I-45). East of I-45, OSR crosses solely into Madison County and ends at Midway at another junction with SH 21.

History

SH OSR was originally designated on September 17, 1929, as Texas State Highway 938,^[2]^[3] to run from Midway to SH 6 (now also US 190) in Benchley, and a second section was designated from SH 21 northeast of Giddings to SH 29 (now US 183) north of Lockhart. On July 15, 1935, the section from SH 44 (now US 77) in Lincoln to SH 21 became part of SH 21. On April 19, 1938, the section from Lincoln to Bastrop also became part of SH 21. On March 26, 1942, a section from US 81 (now I-35) in San Marcos east 4.4 miles (7.1 km) was added (creating a gap), and the designation was changed to SH OSR. On April 28, 1942, the road was extended from Benchley to SH 21 near the Brazos River. On August 2, 1943, the section from SH 29 to 4.4 miles (7.1 km) east of San Marcos was added, closing the gap. Later that day, the section from Bastrop to San Marcos became part of SH 21.^[1]

Major intersections

County	Location	mi^[4]	km	Destinations	Notes
Brazos		0.00	0.00	SH 21 – Caldwell, Bryan	Western terminus
Brazos		4.2	6.8	FM 1687 (Sandy Point Road) – Bryan
Brazos–Robertson county line	Benchley	8.0	12.9	US 190 / SH 6 to Spur 231 – Waco, Houston	Interchange; future I-14; access to Spur 231 via southern frontage road
		12.1	19.5	FM 2223 south – Bryan
		18.8	30.3	FM 46 north – Wheelock
		27.3	43.9	FM 1940 north – Franklin, New Baden
Navasota River		29.0	46.7	Bridge
Madison–Leon county line		31.1	50.1	FM 1452 east
	Normangee	37.2	59.9	FM Spur 3 to FM 3 – Hilltop Lakes
	Normangee	37.5	60.4	FM 39 – Jewett, North Zulch
		39.4	63.4	FM 2289 east
		46.3	74.5	FM 2485 north
		48.0	77.2	I-45 – Centerville, Madisonville	Interchange; I-45 exit 152
Madison		50.3	81.0	SH 75 – Madisonville, Leona
		54.8	88.2	FM 579 north
		57.2	92.1	FM 2346 south
		58.1	93.5	FM 1119 north – Centerville
	Midway	62.0	99.8	SH 21 – Madisonville, Crockett	Eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

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References

1 2 3 4 Transportation Planning and Programming Division (n.d.). "State Highway OSR". Highway Designation Files. Texas Department of Transportation . Retrieved October 25, 2010.
↑ "Minutes" (PDF). publicdocs.txdot.gov. Texas Department of Transportation. September 17, 1929. Archived (PDF) from the original on November 7, 2017. Retrieved April 28, 2023.
↑ "Minutes" (PDF). publicdocs.txdot.gov. Texas Department of Transportation. November 18, 1938. Archived (PDF) from the original on February 23, 2018. Retrieved April 28, 2023.
↑ Google (January 5, 2011). "Overview map of Texas State Highway OSR Distances Between Interchanges" (Map). Google Maps . Google. Retrieved January 5, 2011.

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[State_Highway_OSR-1] 1 2 3 4 Transportation Planning and Programming Division (n.d.). "State Highway OSR". Highway Designation Files. Texas Department of Transportation . Retrieved October 25, 2010.

[2] "Minutes" (PDF). publicdocs.txdot.gov. Texas Department of Transportation. September 17, 1929. Archived (PDF) from the original on November 7, 2017. Retrieved April 28, 2023.

[3] "Minutes" (PDF). publicdocs.txdot.gov. Texas Department of Transportation. November 18, 1938. Archived (PDF) from the original on February 23, 2018. Retrieved April 28, 2023.

[googlemaps-4] Google (January 5, 2011). "Overview map of Texas State Highway OSR Distances Between Interchanges" (Map). Google Maps . Google. Retrieved January 5, 2011.

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