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I’m curious: Does anyone know what the benefit was of choosing the track-guided trolleybus in the first place? I can’t imagine it was much cheaper to build than a regular tramway?
@Paul
From memory, the single guiding track trolleybus was meant to provide the best of both trams and trolleybuses. The trolleybus aspect allowed it to leave the track for diversions (via battery power), whilst also reducing the weight borne by the track, hence much quicker and cheaper track installation. The single track rail guided the bus via steel wheels at 90 degrees from each other – this was supposed to allow better operation in all weather conditions. Unfortunately the custom trolleybuses often lost tracking on the rail, especially in bad weather. The proprietary, single source single track technology was also a problem.