Texas State Highway OSR

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State Highway OSR marker

State Highway OSR
Old San Antonio Road
Route information
Maintained by TxDOT
Length: 62.0 mi[1] (99.8 km)
Existed: 1929 – 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
Counties: Brazos, Robertson, Leon, Madison
Highway system
SH NASA Road 1 SH 1

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 designated on December 17, 1929.[2]

"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[edit]

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[edit]

County Location mi[3] km Destinations Notes
Brazos 0.0 0.0 SH 21 – Caldwell, Bryan
4.2 6.8 FM 1687 (Sandy Point Rd)
along Robertson County line
8.0 12.9 SH 6 / US 190 – Hearne, Bryan Interchange; future I-14
12.1 19.5 FM 2223 south
18.8 30.3 FM 46 north – Wheelock
27.3 43.9 FM 1940 north
along Leon County line
31.1 50.1 FM 1452 east
Normangee 37.2 59.9 FM 3 west
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
54.8 88.2 FM 579 north
57.2 92.1 FM 2346 south
58.1 93.5 FM 1119 north
Midway 62.0 99.8 SH 21 – Madisonville, Crockett
1.000 mi = 1.609 km; 1.000 km = 0.621 mi