In addition to license plate information, the gantries also collect vehicle speed data, which a MassDOT spokesperson said "will not be using the AET system to issue speeding violations". Toll data is not a public record that must be disclosed by Freedom of Information Act requests, and MassDOT "All data collected will remain secure and kept confidential." Toll data can be obtained by subpoena, and law enforcement will be able to specify license-plate numbers that will generate an immediate e-mail if detected by the system.