From the article:

> Heavy-duty tow trucks can transfer air from their system to the trucks to release the brakes, Allen said. Failing that, they could "cage" the brakes, which involves manually backing the brake off each individual wheel.

"We have all the capabilities on our tow trucks to do it … but I don't think anyone would want to," he said.

That's because many companies who provide heavy towing would be hesitant to risk their relationships with trucking companies, Allen said.