BROOKLYN - The Metropolitan Transportation Authority announced yesterday a plan to expand a pilot program that installs protective shields for drivers.

The agency has ordered 100 of the see-through barriers - created with input from drivers and Transport Workers Union Local 100 - for an expanded pilot test.

The MTA decided to try out the shields after bus driver Edwin Thomas was stabbed to death in 2008 on the B46 in Bedford-Stuyvesant. He was killed after refusing a passenger a free transfer.