Sen. Robert A. Zirkin (D-Baltimore County), chair of the Senate Judicial Proceedings, which unanimously voted for the measure to move to the Senate floor, said he wanted the committee to address an amendment offered by some of those who are concerned about costs associated with the bill.

The bill is likely to be considered by the Senate on Wednesday, he said.

"What [the Maryland Transit Administration] is doing is a mass surveillance," Zirkin said.

"I find it outrageous," he said. "I don't want to overstate it, but this is the issue of our generation. As technology advances, it becomes easier and easier to encroach on people's civil liberties."