Add a button to treat this routes as toll free, when looking for the fastest toll free route in conjunction with avoid toll routes. Here a list of toll free routes for qualified and register Disable veterans with TxDot.

Which toll roads are included in TxDOT's veteran toll waiver program?
Central Texas Turnpike System (CTTS) - Austin Metro Area which includes:

SH 130: Segments 1 through 4 of State Highway 130 (SH 130), from Interstate Highway 35 (IH 35) to United States Highway 183 (US 183).

SH 45N
Loop 1: Northward from the non-tolled portion of Loop 1 at Parmer Lane to the SH 45N.
SH 45SE
Grand Parkway (SH 99) - Houston Metro Area
Segments E, F-1, F-2, and G provide travel between I-10 and US 59N on the west and northwest side of Houston. This segment also includes a small portion of Segment D near 1-10.
Segment I-2 extends from Interstate 10 south to Fisher Road in Chambers County, east side of Houston. This toll road segment is near Baytown.
Dallas Toll Roads
DFW Connector (SH 114/121) - Dallas Metro Area.
The managed lanes are located in the existing median on SH 114.
I-30 Managed Lanes: From Sylvan Avenue in Dallas County to just west of Center Street in Tarrant County.
I-635E Express Lanes: HOV/express lanes on I-635 from US 75 to I-30.
I-35E Managed Lanes: Span 18 miles from Denton County to Dallas County.