Texas State Highway OSR
|Old San Antonio Road|
|Maintained by TxDOT|
|Length:||62.0 mi (99.8 km)|
|Existed:||1942 – present|
|West end:||SH 21 near Bryan|
|I-45 near Cross Roads|
|East end:||SH 21 at Midway|
|Counties:||Brazos, Robertson, Leon, Madison|
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.
"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).
|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|
|||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
- Texas Department of Transportation. "Highway Designation File - State Highway Old San Antonio Road (OSR)". Retrieved 2010-10-25.
- Google (2011-01-05). "Overview map of Texas State Highway OSR Distances Between Interchanges" (Map). Google Maps. Google. Retrieved 2011-01-05.