Miscellaneous early operations and demos
Capital District Transportation Co, Albany NY
Virginia Railway and Power
Windsor Hydro
Twin City Rapid Transit
Buffalo NY
Pittsburgh Railways Co
Oklahoma Railways

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Several cities operated small numbers of trolleybuses or had demonstrations from the early 1900s to as late as 1949. Here is a short summary of what's known; more info can be gleaned from the source books. While some pictures exist in the two books, I have not scanned them, as they are clearly copyrighted

Roster
City Year Info
Buffalo NY 1949 The Buffalo Evening News borrowed Cincinnati Street Railway Marmon 1446 and ran it downtown. International Railways wasn't impressed.
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Albany/Cohoes NY Nov 1924 - Dec 1937 Capital District Transportation company purchased 4 Brockways, and ran the line in Cohoes for 13 years. No other extensions.
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Fairhaven MA 1915 Small operation to connect the Union Street Railway with a group of summer cottages along Buzzards Bay, starting October 1914. Lasted for a short time.
Minneapolis MN 1922-1923 Twin City Rapid Transit placed a Brill RailLess car and a homebuilt in service on Bloomington Ave from 38th to 48th Sts. Lasted from April 15, 1922 to May 23, 1923, when TCRT extended the Bloomington Ave streetcar line.
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New Haven CT 1912 AB Uphan sponsored short demonstration in 1903 -- moved to Scranton PA (see below), where it then ran from Nov 1903 to sometime in 1904. In 1912, the Trackless Electric Vehicle company demonstrated a vehicle which could run off both overhead and storage batteries. Nothing came of it.
Norfolk VA 1921-1923 Virginia Railway and Power demonstrations in 1921 and 1923.
Oklahoma City OK 1945 Twenty Brill TC-44s were ordered, but cancelled before delivery and delivered to Memphis instead.
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Petersburg VA June 1923 -
December 31, 1926
Virginia Railway and Power installed the 0.8 mile trolleybus system in June 1923 as a southern extension of the streetcar line service into the residential community of Walnut Hills, requiring two vehicles for service. During the latter part of 1924, the trolleybus line was extended north on South and North Sycamore Streets to a loop between Grove Avenue and Bollingbrook Street in downtown Petersburg, entirely replacing the Petersburg-Walnut Hill streetcar route. Under the extension, five trolleybuses were operated on the 3.5 mile route; however, the city of Petersburg granted permission to operate the trolleybuses only under conditions that practically precluded any chance of their being successful by compelling the company to pay for the construction of a 10-foot wide concrete street as far as the Walnut Hill Bridge and 8-foot wide concrete beyond. The trolleybuses were obligated to confine operations to that strip for loading and unloading passengers (thus curb loading was entirely lost).

On July 1, 1925, the company was reorganized as the Virginia Electric and Power Company. The management of the new company made special efforts to improve public relations. One of the first things was to eliminate the partonage dislike of the hard-riding solid tire trolleybuses and take down the double overhead wires which residents disliked.. Because operation of the trolleybus line was as high as that of gasoline buses, was not used on any other line, did not use standard equipment, and maintenance costs were high, there was no economic reason to retain the service. Thus, the trolleybuses were withdrawn on December 31, 1926 and replaced by gasoline buses the next day on an extended 4.4 mile route that was extended further north of the downtown area to Colonial Heights.

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Pittsburgh PA 1936 Twin Coach demonstrators ran on a one block route downtown. Pittsburgh bought PCCs instead.
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Portsmouth VA 1923 Virginia Railway and Power demonstration
Richmond VA Summer 1921 Virginia Railway and Power demonstrations in 1921 paralleled existing streetcar line on Floyd Ave using an Atlas Truck product dubbed a "trollibus." In 1947, 60 Brills were ordered and cancelled before delivery.
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Scranton PA 1903 An article from The Electrical Worker discussing the American Trackless Trolley Co demo in Scranton PA
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St John NB 1947 Nine Brills were ordered, but cancelled before delivery.
St John's NF 1947 A Canadian General Electric Company Ltd. advertisement from 1947 extols the virtues of trolley coaches with GE motors and controllers, and lists ST. JOHNS, NFLD. (sic) as having ordered trolley coaches along with ST. JOHN, N.B. (sic). The equipment shown in the advert was a CanCar Brill coach.

Newfoundland Light and Power Company investigated trolley coaches in 1946, but the company terminated plans coincident with a consultant's report, but after the advertisement ran in 1947.

     -- Courtesy Tom Schwartzkopf
Victoria BC 1945 A Seattle Twin was demonstrated in Victoria in 1945
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Windsor ON 1922-1926 Bought the St Louis Car Detroit demonstrator, plus three more production St Louis Car trolleybuses. Ran on Lincoln Road and another line from May 5, 1922 to May 1926. The Windsor coaches are different from the Detroit demonstrator in that they did not have a skate, builders sign on the side, their retrievers were below the back window, and they had no cutouts for the back wheels. Not exactly clear which bus was the Detroit demonstrator.
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Table sources: Transit's Stepchild; The Trolley Coach and The Trolley Coach in North America