Trolleybus in the context of "SEPTA"

Public transport (also known as public transportation, public transit, mass transit, or simply transit) are forms of transport available to the general public. It typically uses a fixed schedule, route, and charges a fixed fare. There is no rigid definition of which kinds of transport are included, and air travel is often not thought of when discussing public transport—dictionaries use wording like "buses, trains, etc." Examples of public transport include city buses, trolleybuses, trams (or light rail), rapid transit (metro/subway/underground, etc.) and passenger trains and ferries. Public transport between cities is dominated by airlines, coaches, and intercity rail. High-speed rail networks are being developed in many parts of the world.

Most public transport systems run along fixed routes with set embarkation/disembarkation points to a prearranged timetable, with the most frequent services running to a headway (e.g., "every 15 minutes" as opposed to being scheduled for a specific time of the day). However, most public transport trips include other modes of travel, such as passengers walking or catching bus services to access train stations. Share taxis offer on-demand services in many parts of the world, which may compete with fixed public transport lines, or complement them, by bringing passengers to interchanges. Paratransit is sometimes used in areas of low demand and for people who need a door-to-door service.

A bus (contracted from omnibus, with variants multibus, motorbus, autobus, etc.) is a motor vehicle that carries significantly more passengers than an average car or van, but fewer than the average rail transport. It is most commonly used in public transport, but is also in use for charter purposes, or through private ownership. Although the average bus carries between 30 and 100 passengers, some buses have a capacity of up to 300 passengers. The most common type is the single-deck rigid bus, with double-decker and articulated buses carrying larger loads, and midibuses and minibuses carrying smaller loads. Coaches are used for longer-distance services. Many types of buses, such as city transit buses and inter-city coaches, charge a fare. Other types, such as elementary or secondary school buses or shuttle buses within a post-secondary education campus, are free. In many jurisdictions, bus drivers require a special large vehicle licence above and beyond a regular driving license.

Buses may be used for scheduled bus transport, scheduled coach transport, school transport, private hire, or tourism; promotional buses may be used for political campaigns and others are privately operated for a wide range of purposes, including rock and pop band tour vehicles.

Murmansk (Russian: Мурманск) is a port city and the administrative center of Murmansk Oblast in the far northwest part of Russia. It is the world's largest city north of the Arctic Circle and sits on both slopes and banks of a modest fjord, Kola Bay, an estuarine inlet of the Barents Sea, with its bulk on the east bank of the inlet. The city is a major port of the Arctic Ocean and is about 100 kilometres (62 mi) from the border with Norway, 180 kilometres (110 mi) from the border with Finland and 1,930 kilometres (1,200 mi) from Moscow.

Being a non-freezing port due to the warm North Atlantic Current, Murmansk resembles cities of its size across western Russia, with highway and railway access to the rest of Europe, and the northernmost trolleybus system on Earth. Its connectivity contrasts with the isolation of Arctic ports like the Siberian Dikson on the shores of the Kara Sea, and Iqaluit, in the Canadian Arctic. Despite long, snowy winters, Murmansk's climate is moderated by the generally ice-free waters around it.

The Mérida trolleybus system was an electrified bus rapid transit system that served Mérida, Venezuela, and surrounding communities from 2007 to 2016. Its only line, which was operated by dual-mode trolleybuses, was considered to be "Line 1" of a planned three-route "Mass Transport System" (Sistema de Transporte Masivo), of which Line 2 was also to be trolleybus and Line 3 an aerial cableway. Line 3 was originally planned as a funicular, but was changed to a cableway in 2005. Construction of line 3, the cableway (now named Trolcable), was about 50 percent complete as of May 2011, and the cableway opened for service on 14 December 2012. Construction of Line 2 never started. The operator of the system was originally named Trolmérida, but in August 2009 its name was changed to Tromerca, for Trolebús Mérida, C.A.

The initial 10.4-km route opened in June 2007, and a 2.7-km extension to Mercado Periférico (just southwest of the city centre) opened in September 2012. In August 2015, a 2.1-km extension to Domingo Peña, at the upper terminus of the Line 3 aerial cableway, opened, but with the dual-mode buses running as diesel buses on that section while the overhead wiring awaited installation and, subsequently, certification for use. This brought the length of the trolleybus line to 15.2 km, but with 2.1 km of its length being operated in diesel mode rather than trolleybus mode.