The 183A Toll Road or 183A is a toll road in the Austin metropolitan area of the U.S. state of Texas. The road includes sections in north Austin, Cedar Park, and Leander. It provides a bypass for U.S. Highway 183. The road is owned and operated by the Central Texas Regional Mobility Authority. The 183A Toll road is electronic only and has no cash toll booths. Motorists driving without a toll tag will receive a bill in the mail payable within 30 days. The tolled portion of the highway runs from US-183 near SH-45 to Ranch Road 1431 in Cedar Park. A free portion runs back to US-183 north of Leander, Texas along what will become free frontage roads.