The free ride continues through the end of May for US 183A drivers with a TxTag account. The Central Texas Regional Mobility Authority (CTRMA) will not charge active TxTag holders. TxTag users will also receive a 50% discount in June and a 10% discount over cash thereafter. Some segments of 183A have electronic payment only toll plazas. Get a TxTag sticker and open an account through this site or by calling us at 1-888-GoTxTag (1-888-468-9824).