pedestrians alike, including coverage of intermodal travel and handicapped accessibility. Although the general overview and travel tips are largely still relevant, this classic book has not been updated since 2003, and must be supplemented by current online information. With widespread use of smartphones and tablet computers, online mapping services such as Google Maps have become popular aids for pedestrians, cyclists, and motorists. The MBTA was one of the earliest large transit agencies to embrace the Open Data philosophy, making route, scheduling, and real-time vehicle location information publicly available in the standard GTFS format. As a result, many third-party apps are available on a number of hardware platforms, allowing riders a wide range of choices in obtaining travel information. Google Maps has started to present maps of the interiors of underground subway stations, and this information is available on Android and iOS smartphones, as well as web browsers. Buses 162 MBTA bus routes operate within the Greater Boston area, with a combined ridership of approximately 375,000 one-way trips per day, making it the seventh-busiest local bus agency in the country. Included within the MBTA system are four of the few remaining trackless trolley lines in the US (71, 72, 73 and 77A), although these principally operate in the adjoining city of Cambridge. The bus fare is $1.70 with a CharlieCard, or $2 with a CharlieTicket or cash; monthly commuter passes are available, as are reduced fare transfers between most bus lines and the subway. In an effort to provide service intermediate in speed and capacity between subways and buses, the MBTA has begun projects using bus rapid transit (BRT) technology. The MBTA has one BRT line, the Silver Line, although this operates in two discontinuous sections. The Silver Line operates in part via dedicated trolleybus tunnel, in part via on-street reserved bus lanes, and in part mixed with general street traffic. Service through the trolleybus tunnel is by dual-mode buses, which operate electrically in the tunnel and within a short section on the surface, and which use diesel power for the rest of the route. Massport operates the Logan Express, an express bus service between Logan International Airport and suburban park-and-ride lots. Several privately owned commuter bus services take passengers between the city and suburbs. Transportation Management Associations also run public shuttles to specific employment centers, such as the EZ Ride for Kendall Square; and the Route 128 Business Council shuttles