Route 99 is a bus route operated by the Maryland Transit Administration

Maryland Transit Administration

The Maryland Transit Administration is a state-operated mass transit administration in Maryland, and is part of the Maryland Department of Transportation. It is better known as MTA Maryland to avoid confusion with other cities' transit agencies who share the initials MTA. The MTA operates a...

 in the suburbs of Baltimore

Baltimore

Baltimore is the largest independent city in the United States and the largest city and cultural center of the US state of Maryland. The city is located in central Maryland along the tidal portion of the Patapsco River, an arm of the Chesapeake Bay. Baltimore is sometimes referred to as Baltimore...

. The line currently runs from the Old Court Metro Subway Station in Pikesville, Maryland

Pikesville, Maryland

Pikesville is a census-designated place in Baltimore County, Maryland, United States. Pikesville is just northwest of the Baltimore city limits. It is the northwestern suburb closest to Baltimore.The population was 29,123 at the 2000 census...

 to BWI Thurgood Marshall Airport, and serves Randallstown

Randallstown, Maryland

Randallstown is an unincorporated community and a census-designated place in Baltimore County, Maryland, United States. It is named after Christopher and Thomas Randall, two 18th-century tavern-keepers. At that time, Randallstown was a tollgate crossroads on the Liberty Turnpike, a major east-west...

, Windsor Mill, Woodlawn

Woodlawn, Maryland

Woodlawn is the name of some places in the U.S. state of Maryland:*Woodlawn, Baltimore County, Maryland*Woodlawn, Prince George's County, Maryland...

, Catonsville, Arbutus

Arbutus, Maryland

As of the 2010 Census Arbutus had a population of 20,583. The racial and ethnic compositon of the population was 76.6% non-Hispanic white, 9.5% non-Hispanic black, 0.2% Native American, 2.1% Asian Indian, 6.5% other Asian, 0.1% Pacific Islander, 0.2% non-Hispanic from some other race, 2.3% from...

, Halethorpe, and Landsdowne, and the campuses of UMBC and CCBC Catonsville

Community College of Baltimore County

The Community College of Baltimore County is an accredited community college located in Baltimore County, Maryland in the United States with three main campuses and two extension centers.- Programs and enrollment :...

 (formerly Catonsville Community College). It currently operates Monday through Friday during peak hours only. The route's purpose is to provide riders in northwest part of Baltimore County a direct connection to the airport, the Metrobus B30 and the Intercounty Connector commuter bus route 201. The route, for the most part, is similar to the 77 line, except it utilizes Interstate 695

Interstate 695 (Maryland)

Interstate 695 is a -long full beltway Interstate Highway extending around Baltimore, Maryland, USA. I-695 is officially designated the McKeldin Beltway, but is colloquially referred to as either the Baltimore Beltway or 695...

 for a faster connection from Edmondson Ave to Security Blvd. It also utilizes Interstate 195

Interstate 195 (Maryland)

Interstate 195 is an Interstate highway in the U.S. state of Maryland. Known as Metropolitan Boulevard, the highway runs from Baltimore/Washington International Thurgood Marshall Airport in Linthicum north to I-95 in Arbutus, where Metropolitan Boulevard continues north as Maryland Route 166 ,...

 for a faster connection between UMBC and BWI Airport.