SH 140 begins at the signalized intersection of Big Spring Street and West Florida Avenue. Big Spring Street travels north and south and carries the designation of Bus. SH 349-C, formerly SH 349; West Florida Street travels west as a city-maintained street. The state-maintained West Florida Street travels due east from this intersection with speed limit of. At the intersection with Main Street, the road name becomes East Florida Avenue and the speed limit increases to. At Dallas Street, the speed limit increases again to. SH 140 curves slightly to the south at the Lamesa Road intersection; at this point, the road name becomes Garden City Highway, the speed limit increases a final time to, and Farm to Market Road 307 can be accessed one block to the north of this intersection. After a long straightaway, there is a signalized intersection with South Fairgrounds Road; the road to the south is FM 715 and provides a shortcut to I-20 and SH 158 westbound. About later, SH 140 reaches its end at the westbound frontage road for I-20 and SH 158. The interchange complex is part of I-20's exit 138. I-20 and SH 158 form a concurrency west of here, while SH 158 continues east along Garden City Road towards the eastbound frontage road and Garden City. For its entire length, SH 140 is a four-lane undividedasphalt road with a center turn lane. Commercial businesses, open and abandoned, line both sides of the road throughout the entirety of the highway.
History
The road on which SH 140 is now designated has been a part of the Texas state highway system since at least the 1930s. From December 21, 1935 until 1984, this highway was a part of SH 158 which formerly traveled through downtown Midland. On April 9, 1984, SH 158 was rerouted onto I-20 south of the city and the old route through the city including current SH 140 became State Highway Loop 546. This number would last for approximately six years until it was replaced in its entirety by Bus. SH 158-B on June 21, 1990. After a redesignation of various highways in Midland on June 30, 2011, Bus. SH 158-B was moved onto SH 58 in western Midland and the portion of the old business highway between Bus. SH 349-C and I-20/SH 158 became SH 140. The number was previously used from June 26, 1929 on a short highway branching from SH 31 in Smith County, southwest of Tyler to the Tyler Fish Hatchery. On January 8, 1934, SH 140 was to be gravelled, but was to be removed from the state highway system when construction was complete. This happened on July 30, 1934, but the road was restored as Spur 164 on February 28, 1945.
