The Route 40 started operating on October 23, 2005 When it started operating, Route 40 ran from Security Square Mall to the Essex Park-and-Ride lot on
Eastern Avenue. Weekday service operated every 10 minutes during rush hour and midday. On February 5 the following year, it was extended to Middle River and reduced to one bus every 12–15 minutes. On June 10, 2007, the eastern
layover was moved to a safer location at Old Eastern and Vincent Avenues. The western layover was moved to CMS on February 8, 2009 and the stop at Security Square Mall was moved from the parking lot of the mall to a point along
Security Boulevard adjacent to the mall lot.
Quickbus 40 PLUS Service Enhanced service for West Baltimore residents on the QuickBus 40 will begin October 25, 2015. The enhanced service will increase frequency and reliability on the line between the Centers for Medicare and Medicaid in Baltimore County and City Hall in Baltimore City. Customer will find additional bus trips added on west side between CMS and City Hall to enhance off-peak and weekend access to jobs.
Criticism Route 40 received a lot of criticism following its inauguration from riders, politicians, and the media. This criticism resulted in some changes being made to the route, schedule, and other details. The service, which was projected to have a daily ridership level of 27,000, fell far short of that goal. Many riders waiting for other buses at common stops complained about seeing a lot of empty Route 40 buses. Special pylons were added at selected stops to mark the locations. The name "QuickBus" was synonymous with Bus Route 40 until August 30, 2009, when another QuickBus line, known as
Route 48, started operation along the
Greenmount Ave/York Rd corridor. The MTA had added two more QuickBus lines:
Route 46 and
Route 47 on August 29, 2010. ==History (2017-present)==