| 31. | The fare mezzanines and staircases were reconfigured over the years as streetcars were replaced by trackless trolleys and later buses.
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| 32. | As built, many of the key rapid transit transfer stations were trackless trolley operation; other such spaces have been closed.
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| 33. | Diesel buses temporarily replaced trackless trolleys on route 75 in June 2002, but trackless service was restored in April 2008.
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| 34. | Buses replaced trackless trolleys on the 22 on April 6, 1962, running as the 22 Ashmont-Dudley via Talbot and Warren.
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| 35. | The Harvard Bus Tunnel also opened in 1912, originally serving streetcars but now buses and trackless trolleys ( trolleybuses ).
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| 36. | The trackless trolleys ( or trolleybuses ) replaced trolley cars ( streetcars ) on the route on in June 25, 1950.
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| 37. | Buses started running on the 15 Kane Square-Dudley via Uphams Corner and Dudley Street on April 6, 1962, replacing trackless trolleys.
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| 38. | In 1958, the Harvard Square tunnel routes were replaced with electrically powered trackless trolleys, which were the only such MBTA routes.
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| 39. | The Many transit operators removed some streetcar tracks but kept the electric infrastructure so as to run electrified trackless trolley buses.
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| 40. | Unlike the buses, MBTA trackless trolleys are specially equipped with a wide left-side door, to ease faster boarding in the tunnel.
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