The road begins at FM 1467 northeast of Owens, and continues south until meeting with US 377 in Early.

FM 3100 was designated on June 2, 1967, from US 67 north 4.1 miles (6.6 km) to a road intersection at Salt Creek Church.

[1] A previous route numbered FM 3106 was designated on June 2, 1967, from US 77 at Bluff Dale south 4.8 miles (7.7 km) to Richardson Creek.

A previous route numbered FM 3120 was designated on June 1, 1967, from FM 364, 0.8 miles (1.3 km) south of SH 105, north and northwest 3.2 miles (5.1 km) to Willis Lane and Tram Road.

[25][29][30] Farm to Market Road 3133 (FM 3133) is located in Grayson and Collin counties.

The highway travels in an eastern and southward direction through rural farming areas, ending at an intersection with FM 2862 in Westminster.

FM 3133 was designated on July 11, 1968, traveling from SH 5 southeastward to the Collin County line at a distance of 4.4 miles (7.1 km).

Farm to Market Road 3151 (FM 3151) is located in southwestern Houston County.

The two-lane, 4.6-mile (7.4 km) road travels northward before terminating in Pearson's Chapel at FM 1280 between Austonio and Lovelady.

[60] Farm to Market Road 3155 (FM 3155) is located in Fort Bend County.

FM 3155 heads northwest on Collins Road, crossing the Union Pacific Railroad tracks.

At Preston Street, FM 3155 turns sharply west for a few blocks then curves to the northwest.

FM 3159 begins at an intersection with SH 46/Smithson Valley Road east of Bulverde.

The highway travels in a northeast direction, entering Canyon Lake at an intersection with FM 311.

FM 3159 travels through more rural areas of the CDP, with the route becoming more suburban north of Cranes Mill Road.

The highway was extended 3.7 miles (6.0 km) southwestward to the Comal County line on September 29, 1977; this section was later cancelled on November 19, 1979.

FM 3161 continues to run in a mostly northern direction, ending at an intersection with SH 97 southeast of Floresville.

The state designation and maintenance of the road ends approximately 17 miles (27 km) northeast of San Ygnacio.

Farm to Market Road 3177 (FM 3177) is a 4.8-mile (7.7 km) divided roadway located in Travis County.

[94] It begins at FM 969 in Austin, heading northeast on Decker Lane, a four-lane divided highway.

[95] It passes the Travis County Exposition Center which contains Luedecke Arena, to the east, and runs to the west of Lake Walter E. Long.

FM 3177 crosses a Capital Metropolitan Transportation Authority line and reaches its northern terminus at an intersection with US 290.

The highway travels in a northern direction along Stuart Place Road through suburban areas of the city.