"We're experimenting. We're seeing if it's conducive for our environment and if it's beneficial for transit policing in general," he said.
The cameras, by Safety Innovations, are about the size of a cellphone. For the field test, they will be carried by three officers.
"We're hoping it will reduce the number of use-of-force incidents, and we're hoping it will reduce the number of complaints. We're hoping that it will help us in investigating complaints and showing that officers did exactly what they were supposed to do," Nestel said.
He said the cameras could cut down on the court overtime costs "because we'll have video of the incident, and an officer won't be necessary for court."
Nestel said the model being tested costs about $300 per camera - but that others cost as much as $1,500.
He said he did not know of any transit agency police using the cameras. He said departments in Pittsburgh and California had tested the practice.