Guess propulsion type by its noise

AI Thread Summary
The discussion centers on identifying a vehicle's propulsion type based on the noise it produces. The original poster suggests it may be a trolleybus, referencing poles along the route and related videos. They recall trolleybuses being used in a nearby UK town during the 1950s and 60s, noting their surprisingly loud operation despite being electric. The conversation highlights the distinct sound characteristics of different propulsion types. Overall, the focus is on the auditory clues that can indicate a vehicle's propulsion system.
Stanley514
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Could you define what propulsion type this one vehicle uses by noise it makes?

 
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Judging by the poles along the route, (and some of the other videos listed on the youtube page) I guess it's a http://en.wikipedia.org/wiki/Trolleybus

There were in use in a town about 30 miles from where I lived in the UK, back in the 1950s and 60s. They were remarkably noisy, for electric powered vehicles.
 

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