Pronunciation: [tɹˈɒlɪbjˌuːsɪz] (IPA) 
The word "trolleybuses" is spelled with two Ls because it is a compound word made up of "trolley" and "buses." The first part, "trolley," comes from the noun "trolley," which refers to a wheeled cart used for transporting goods. The second part, "buses," comes from the plural of "bus," which is a shortened form of "omnibus." The correct IPA phonetic transcription for the word "trolleybuses" is /ˈtrɒliˌbʌsɪz/.
Trolleybuses are an advanced form of public transportation that combines the features of both buses and electric streetcars. Also known as trolley buses or trackless trolleys, they are essentially buses that are powered by electricity from overhead wires instead of internal combustion engines.
Trolleybuses have an electric motor that receives power from the overhead wires through a set of specially designed poles that make contact with the wires. These poles are attached to the bus's roof, allowing it to draw electricity and propel itself forward. The wires are typically installed above the center of the road or over a separate lane designated exclusively for trolleybuses.
Like traditional buses, trolleybuses have rubber tires and can navigate the streets freely, following established bus routes. However, unlike buses that rely on fossil fuels, trolleybuses are much more environmentally friendly as they produce zero tailpipe emissions. They offer significant reductions in air and noise pollution, making them a desirable option for urban areas aiming to improve their sustainability and reduce reliance on fossil fuel-powered vehicles.
Trolleybuses are generally quieter and smoother in operation due to their electric motors, which also provide instant torque, improving their acceleration. They often boast advanced technological features such as regenerative braking, which allows them to recover and reuse energy when decelerating or stopping. This technology contributes to energy efficiency and extends the range of the trolleybus between recharges.
Overall, trolleybuses offer an efficient, eco-friendly, and flexible mode of public transportation that combines the benefits of traditional buses with the environmental advantages of electric vehicles.
The word "trolleybus" is a combination of two parts: "trolley" and "bus".
The term "trolley" originally referred to a streetcar or tram powered by electricity via an overhead wire system. It comes from the word "troller", meaning a pulley or a similar device used for guiding or controlling something. The pulley-like mechanism used to obtain power from the overhead wires and transfer it to the streetcar's motor resembled a troller, hence the name.
The word "bus" comes from the Latin word "omnibus", meaning "for all". "Omnibus" was initially used to describe a horse-drawn carriage available for public transportation. Over time, as horse-drawn carriages were replaced by motorized vehicles, the term "bus" was adopted to describe any form of public transportation capable of carrying multiple passengers.
