State Highway 145 begins at Exit 79 along Interstate 35 in northern Garvin County.

From this point, it heads east along Davis Avenue until it reaches the town of Paoli.

At this point, the highway served as a de facto Pauls Valley bypass, as SH-19 dipped down to the south to run through the Garvin County seat, while SH-145 continued on a straight course.

The highway had also been nearly-entirely paved by this point, with only a short section near the eastern terminus still gravelled.

The event also led to the passage of House Bill 1176, which added either $50 million or $17.5 million to ODOT's annual budget, depending on the state's revenue for the fiscal year.