Texas State Highway 170

State Highway 170 (SH 170), also known as the Alliance Gateway Freeway, is a Texas state highway in the northern suburbs of Fort Worth in the Alliance area. The highway was designated in 1988.

Previous route
A previous route numbered SH 170 was designated on August 3, 1932, as a connector route from the Oklahoma state line west to US 60 and US 83 near Canadian. This route was renumbered SH 33 on October 26, 1954, to coincide with OK 33, with which it connects.

Current route
The current SH 170 was designated in 1988.

Construction of an interchange at SH 114 began in 2016.

TxDOT and the NTTA held a public hearing in Roanoke about the proposed toll road on February 26, 2015. The tollway was proposed to have six main lanes. The main lanes between I-35W and SH 114 opened to traffic on March 18, 2024.

Proposed Tollway
The North Texas Tollway Authority (NTTA) planned to build tolled main lanes by 2015 and will extend the highway west to US 287/US 81, and, eventually, ultimately to extend it to the Jacksboro Highway (SH 199), but it did not occur.