Texas State Highway OSR

State Highway OSR
	Old San Antonio Road
Route information
	Maintained by TxDOT
Length	61.918 mi[1] (99.647 km)
Existed	1942[1]–present
Major junctions
West end	SH 21 near Bryan
	SH 6 / US 190 in Benchley I-45 near Cross Roads
East end	SH 21 at Midway
Location
Counties	Brazos, Robertson, Leon, Madison
Highway system

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] It was originally designated on December 17, 1929 as Texas State Highway 938, with the SH OSR designation first being used in 1942.^[2]^[3]^[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

OSR begins at an intersection of State Highway 21 just east of the Brazos River in Brazos County.

OSR crosses U.S. Highway 190 and State Highway 6 north of Bryan; at a point just west of this intersection OSR becomes the county line between Brazos County and Robertson County.

Upon crossing the Navasota River, OSR continues as the county line, this time for Leon County and Madison County.

OSR passes through Normangee and crosses Interstate 45. East of Interstate 45 OSR crosses solely into Madison County and ends at Midway at another junction with SH 21.

A sign for Texas State Highway OSR, located west of Normangee, Texas near Interstate 45.

Major intersections

County	Location	mi^[4]	km	Destinations	Notes
Brazos		0.0	0.0	SH 21 – Caldwell, Bryan
Brazos		4.2	6.8	FM 1687 (Sandy Point Rd) – Bryan
Brazos along Robertson County line	Benchley	8.0	12.9	SH 6 / US 190 – Hearne, Bryan	Interchange; future I-14
		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
Madison along Leon County line		31.1	50.1	FM 1452 east
	Normangee	37.2	59.9	FM 3 west – 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
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References

1 2 3 4 Texas Department of Transportation. "Highway Designation File - State Highway Old San Antonio Road (OSR)". Retrieved 2010-10-25.
↑ (PDF) https://publicdocs.txdot.gov/minord/MinuteOrderDocLib/003673789.pdf. Missing or empty |title= (help)
↑ (PDF) https://publicdocs.txdot.gov/minord/MinuteOrderDocLib/003676252.pdf. Missing or empty |title= (help)
↑ Google (2011-01-05). "Overview map of Texas State Highway OSR Distances Between Interchanges" (Map). Google Maps. Google. Retrieved 2011-01-05.

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[State_Highway_OSR-1] 1 2 3 4 Texas Department of Transportation. "Highway Designation File - State Highway Old San Antonio Road (OSR)". Retrieved 2010-10-25.

[2] (PDF) https://publicdocs.txdot.gov/minord/MinuteOrderDocLib/003673789.pdf. Missing or empty |title= (help)

[3] (PDF) https://publicdocs.txdot.gov/minord/MinuteOrderDocLib/003676252.pdf. Missing or empty |title= (help)

[googlemaps-4] Google (2011-01-05). "Overview map of Texas State Highway OSR Distances Between Interchanges" (Map). Google Maps. Google. Retrieved 2011-01-05.