The Baker administration has stripped dozens of vehicles of their blue emergency lights because they were deemed unnecessary, according to a systemwide review officials said was sparked by an ex-parks deputy who misused a state-issued car to weave through Boston traffic.

The monthslong audit, which officials wrapped up last month, identified 30 vehicles they said didn’t need the emergency equipment, including 22 alone in the Department of Correction, the most of any state agency.

It also included a handful of cars under the Massachusetts Parole Board and another three the Department of Public Health used as “security vehicles” to do rounds on the campuses of the Tewksbury and Shattuck State Hospitals. But not everyone with access to those were actually police officers, so state officials decided to remove their lights.

Felix Browne — a spokesman for the Executive Office of Public Safety and Security, which conducted the review — said officials did not find any instances of abuse amid the audit, but felt the decisions to remove the emergency equipment were necessary because the employees didn’t need them to do their jobs.

In all, state officials ultimately took away the lights from about 6 percent of the equipped fleet they examined.

“Following this review, the only cars with emergency lights will be driven by operators who need them to perform the duties of their position,” Browne said.

Baker officials launched the audit after revelations surfaced in late September that Matthew Sisk, the former $112,200-a-year deputy commissioner for the Department of Recreation and Conservation, had used the lights and siren on a state vehicle to cut through traffic in the Seaport, officials said. State police said he did so on two occasions, once in June and again in July, and Sisk later resigned.

The revelations came amid a series of embarrassing stumbles at DCR and its parent agency, the Executive Office of Energy and Environmental Affairs, that started with Sisk and DCR Commissioner Leo Roy being admonished for using taxpayer resources to throw a pre-Fourth of July bash at the home of a prominent state GOP official.

The review by public safety officials covered roughly 2,700 vehicles statewide, not counting the State police fleet.

But about 504 of those actually had either red or blue lights beforehand, including 418 under public safety agencies and more than 80 in EEA, among them ranger and fire vehicles. Following the review, there are now 474.

Browne said in many cases, public safety agencies that used the lights had shifted vehicles to other departments in an effort to “stretch budget dollars” but never removed them.

“Some of these vehicles are equipped with emergency lights, which may not be necessary to have after the car is transferred to a different public safety agency,” he said.

The Herald reported last fall that state officials had stripped 22 workers of their take-home vehicles following a separate review that began in July and concluded in September, before the revelations around Sisk became public.

At the time, Baker officials said they “tightened” standards for the perk and workers either had their renewal applications denied or voluntarily withdrew them, including Sisk. There are currently 185 take-home vehicles statewide.

As part of that process, the number of take-home vehicles that also had emergency lights was also trimmed by 31 to 122 vehicles, according to the Office of Administration and Finance.

An ANF spokesman said the state has already begun a new review period for the take-home privilege. “Everyone must reapply on an annual basis,” spokesman Garrett Quinn said.