What is All Electronic Tolling (AET)?
AET refers to a toll road or managed lane that collects all fees electronically through either a transponder system or toll-by-plate system. There are no conventional toll booths or cash collection of any kind on these facilities. Transponder systems vary across the country, with Fastrak used by California, TxTag and others in Texas, Sunpass in Florida and E-ZPass spread across Midwestern and Northeastern states among many more.