On Monday, May 13, ACHD received a ransomware attack. ACHD's Information Technology department was able to restore full functionality within 30 hours of the initial onset.
No data was lost during the breach, and ACHD did not pay the ransom. Though the website was down, ACHD facilities remained open and able to serve customers throughout the event. By Tuesday afternoon, computers throughout the highway district were back up and running.
The attack was reported to the FBI and Homeland Security.