This little strip of road looks unremarkable, but it is historic with a capital H.  Located on the grounds of 
Fort Davis National Historic Site, this is a remnant of the old San Antonio-El Paso road, a stagecoach route.
The Fort's website says this:
" In October 1855, Second Lieutenant Zenas R. Bliss, Eighth U. S. 
Infantry, arrived at Fort Davis seventeen days after boarding the 
westbound stage in San Antonio. "
The Post was the most beautifully 
situated of any that I have ever seen. It was in a narrow canyon with 
perpendicular sides, the walls of which were about 200 feet in height,"
 the young officer later wrote. The necessity for the post, located some
 400 miles from San Antonio and 200 miles from Franklin (present-day El 
Paso), stemmed from demands for protection on the San Antonio-El Paso 
Road. A major link along the most southern route to California, the road
 experienced an upsurge of travel in the early 1850s following the 
discovery of gold in California. As travel along the road increased, so 
did Comanche, Kiowa, and Apache raids into Mexico. Emigrants, mail 
carriers and merchants journeyed in constant fear of the raiding 
warriors who traveled between Mexico and their homelands to the north. 
Despite its picturesque terrain, the buildings were uncomfortable and 
difficult to keep warm. "
I remember once in a snow storm the snow blew under my bed . . . and it stayed there several days without melting,"
 wrote Lieutenant Bliss. In 1856, six stone barracks with thatched roofs
 and flagstone floors replaced inadequate enlisted men’s quarters. Along
 with the bakery, blacksmith shop, and a warehouse, they were the only 
substantial structures of the first fort."
And this:
"The first Fort Davis served as a retreat for thousands of emigrants, 
freighters, and travelers during the decade preceding the Civil War. It 
provided protection for the U. S. Mail and saw the establishment of a 
number of stage stations and military posts in the region, including 
Fort Stockton and Fort Quitman. It was also an influencing factor in 
1859 for the Butterfield Overland Mail to change its route to El Paso. 
The new route came through Fort Davis instead of following the road 
through the Guadalupe Mountains. Although the post did little to reduce 
Indian activity in western Texas, its presence encouraged travel on the 
San Antonio-El Paso Road and settlement in the Trans-Pecos region."
Straight off the Fort property to the east on "Fort Street" is the 
Overland Trail Museum, a community museum showing early life in Jeff Davis County.  Definitely worth a stop, visitors not only enjoy the museum's exhibits but the fact that it is along the still unpaved, original San Antonio-El Paso Road. 
You can read more about the first Fort Davis (1854-1862) and its history here.
http://www.nps.gov/foda/historyculture/firstfortdavis.htm