6 was constructed by the FBCTRA, not by TXDOT. Currently, the FBCTRA is constructing an expansion to Sienna Ranch Road west of Sienna Parkway. The extension is to be finished by 2023. Signage and designation The name of the road and its signage change along its route: Fort Bend Toll Road - from US 90 Alt to Beltway 8 / Sam Houston Parkway Fort Bend Parkway Toll Road - from Beltway 8 / Sam Houston Parkway to SH 99 (Grand Parkway) or SH 122 Toll (cancelled) - formerly used for entire route while it was being built. Eventually, it was decided that the toll road would not use state funding, so the SH 122 designation was no longer necessary. Although the Fort Bend Toll Road (Harris County) and the Fort Bend Parkway Toll Road (Fort Bend County) connect as one contiguous route, each is signed as a separate route. State Highway 122 existed as a placeholder for TxDOT in case it was decided to use state funding to build the toll road. Exit list The proposed SH 122 would extend from SH 6 to the planned segment of SH 99 that will be built to the south. In the future, South Post Oak Road/Chimney Rock Road will be a part of the Fort Bend Parkway Toll Road. References External links Fort Bend County Toll Road Authority Harris County Toll Road Authority Transportation in Fort Bend County, Texas Transportation in Harris County, Texas Freeways in Houston Toll roads in Texas County roads in Fort Bend County, Texas County roads in Harris County, Texas