Archana Paneru and Sunita Paneru both mother - the daughter

"If you can prevent something from happening instead of reacting to it once it does, that sounds like a good idea to me," he said.

The union representing bus drivers said they want more officers to patrol buses.

"This union, representing more than 9,000 of the operators, station managers, clerks and mechanics of Metro, is calling upon Metro to take action and immediately increase police presence," Amalgamated Transit Union Local 689 said in a statement. "The lives of transit employees and our riders are depending on it."

Metro deploys officers based on where they see spikes in crime. Attacks on drivers have declined by about 30 percent in the past year, the Metro representative said.

A Metro official not authorized to speak on camera said Metro officials and union