The line operates hourly (except overnight) between the Moravia loop in Northeast Baltimore and Whispering Woods, just east of Bowleys Quarters.

[2] The line originated from Franklin Square Hospital and then operated through the parking lot of the now defunct Golden Ring Mall, then to a stop in Middle River, where buses made a U-turn, and continued east on Eastern Boulevard to Oliver Beach.

But its largest growth came in 2005, when a previously unannounced GBBI change was made, in which steady hourly service was provided, and selected trips were routed via Pulaski Industrial Park.

In 2006, the layover was moved from Franklin Square Hospital to the CCBC Essex campus to improve exchanges with Route 4 buses.

On August 31, 2009, selected trips on Route 33 to Essex Park-and-Ride which had operated since 2005 were discontinued, and the line was shortened to the Moravia loop.