State data shows that more than 3,200 license plates have been issued to local, state and federal agencies with a designation that allows them to avoid tickets from Iowa traffic cameras.
A recent speeding incident involving Gov. Terry Branstad's state SUV has revealed how cities give a break to some government vehicles caught on red light and speed cameras.
Several cities said they do not issue tickets to drivers whose plates are not included in police databases because they're conducting undercover or sensitive work.
Iowa Department of Transportation data requested by The Associated Press shows that 350 agencies have been issued at least one license plate with that designation, ranging from small police departments to the Transportation Security Administration.
The Iowa Department of Natural Resources leads the way with 210.