The line is a dedicated service for employees of Stella Maris, a complex of long term care facilities in Timonium, Maryland.
But due to public outcry, service to Stella Maris was retained by MTA on the new Route 12 that operated back then out of the Lutherville Light Rail Stop at the same times these trips were previously provided on the Route 8.
On August 24, 2008, Route 12 was modified again to operate between Stella Maris and Greenmount and North Avenues.
Today, Route 12 is one of two buses operated by MTA for the benefit of a single employer.
On June 18, 2017, as part of the BaltimoreLink transit overhaul Route 12 will be replaced in its entirety by LocalLink 52.