Comparing modes Seven criteria estimate the usability of different types of public transport and its overall appeal. The criteria are
speed,
comfort,
safety,
cost,
proximity,
timeliness and directness. Speed is calculated from total journey time including transfers. Proximity means how far passengers must walk or otherwise travel before they can begin the public transport leg of their journey and how close it leaves them to their desired destination. Timeliness is how long they must wait for the vehicle. Directness records how far a journey using public transport deviates from a passenger's ideal route. In selecting between competing
modes of transport, many individuals are strongly motivated by
direct cost (travel fare/ticket price to them) and
convenience, as well as being informed by
habit. The same individual may accept the lost time and statistically
higher risk of accident in
private transport, together with the initial, running and parking costs.
Loss of control, spatial constriction,
overcrowding, high speeds/accelerations, height and other
phobias may discourage use of public transport. The
transport hub makes it easier for travellers to use different modes of transport during one trip. Actual travel time on public transport becomes a lesser consideration when
predictable and when travel itself is reasonably
comfortable (seats, toilets, services), and can thus be scheduled and used pleasurably, productively or for (overnight) rest. Chauffeured movement is enjoyed by many people when it is relaxing, safe, but not too monotonous. Waiting, interchanging, stops and holdups, for example due to traffic or for security, are discomforting.
Airline An airline provides scheduled service with
aircraft between airports, the majority using
airplanes. Air travel has high speeds, but incurs large waiting times before and after travel, and is therefore often only feasible over longer distances or in areas where a lack of surface infrastructure makes other modes of transport impossible. Since the 1970s, the
hub-and-spoke system increased in popularity, compared to point-to-point flights.
Jet lag is a human constraint discouraging frequent rapid long-distance east–west commuting.
Bush airlines work more similarly to bus stops; an aircraft waits for passengers and takes off when the aircraft is full. File:Bush plane at Eklutna Lake.jpg|Bush plane
Piper PA-18 Super Cub File:Berlin Brandenburg Airport Iberia Express Airbus A321-251NX EC-NGP (DSC07630).jpg|An
Iberia Express Airbus A321 in 2024
Bus and coach Bus services use
buses on conventional roads to carry numerous passengers on shorter journeys. Buses operate with a relatively low capacity compared with
trams,
light rail, or
trains, and can operate on conventional roads, with relatively inexpensive
bus stops to serve passengers. Therefore, buses are commonly used in smaller cities, towns, and rural areas, and for
shuttle services (e.g.
to the airport) supplementing other means of transit in large cities.
Midibuses have an ever lower capacity, however
double decker buses,
articulated buses and
bi-articulated buses have a slightly larger capacity.
Intercity bus service use
coaches (long-distance buses) for
suburb-to-
CBD or longer-distance transportation. The vehicles are normally equipped with more comfortable seating, a separate luggage compartment, video and possibly also a toilet. They have higher standards than city buses, but a limited stopping pattern. Certain types of buses, styled after old-style streetcars, are also called trackless trolleys, but are built on the same platforms as a typical
diesel,
CNG, or
hybrid bus; these are more often used for tourist rides than commuting and tend to be privately owned. Similarly,
trackless trains are often used for moving tourists between
sights, often at beach resorts, or visitors within
amusement parks, among others. In recent years, the world has significantly shifted toward sustainability and eco-conscious systems. This involves the deployment of technology and the large-scale integration of electric vehicles (EVs). According to the International Finance Corporation (IFC), the transition to electric buses represents a critical frontier in transportation engineering . This transition requires engineers to redesign power grids and depot logistics to accommodate charging demands while balancing the high upfront costs of zero-emission fleets against long-term operational savings. However, although buses contribute to a little percent of overall road travel, their frequent usage rate makes them a notable contributor to GHG emissions . The Environmental Protection Agency (EPA) affirms that transitioning to buses with zero emissions can reduce the outflow of greenhouse gases by 65% when compared to the regular fossil fuel powered buses . It is no news the harmful effects these greenhouse gases have on the environment at large. Their harmful impacts span across the atmosphere, Biosphere, lithosphere, and the hydrosphere. As reliance on battery and fossil fuels powered buses and transport systems as a whole continues to drop and transitions to renewable energy continue to take place, environmental remediation can be achieved . Furthermore, to achieve a net zero emissions rate by 2050, a quota of over 75% electric bus sales should be achieved by 2030 . Although the diesel-electric engines are not purely sustainable and might not look like a complete development, it’s an improvement of the already existing traditional system.
Trolleybus and electric buses Trolleybuses are
electrically powered buses that receive power from
overhead power line by way of a set of trolley poles for mobility.
Online Electric Vehicles are buses that run on a conventional battery, but are
recharged frequently at certain points via underground wires.
Electric buses can store the needed electrical energy on board, or be fed mains electricity continuously from an external source such as overhead lines. The majority of buses using on-board energy storage are battery electric buses (which is what this article mostly deals with), where the electric motor obtains energy from an onboard battery pack. Metra - 8161 - Flickr - Rafael Delazari (cropped).jpg|
Busscar trolleybus serving in
São Paulo BMP-240379 Transjakarta Bianglala Metropolitan Golden Dragon Bus.jpg|
Transjakarta electric bus for bus rapid transit system serving in
Jakarta File:SJT OLEV bus.jpg|
Olev online electric bus system in
Daejeon Bus rapid transit and guided busway Bus rapid transit (BRT) is a term used for buses operating on a dedicated
right-of-way, much like a light rail; resulting in a higher capacity and operating speed compared to regular buses. A
guided bus is capable of being steered by external means, usually on a dedicated track or roll way that excludes other traffic, permitting the maintenance of schedules even during rush hours. Bogota TransMilenio bus biarticulado.jpg|Articulated
Transmilenio bus for the
bus rapid transit system in
Bogotá Scania K280UB O-Bahn Bus.jpg|A
O-Bahn Busway bus in
Adelaide, on the
guided busway Rail Passenger rail transport is the conveyance of passengers by means of wheeled vehicles specially designed to run on railways. Trains allow high
capacity at most distance scales, but require
track,
signalling,
stations and other infrastructure (e.g.
electric cables) to be built and maintained, resulting in high upfront costs. Passenger rail is used on long distances (even crossing national borders), within regions and in various ways in
urban environments. In many
European countries, operators use specific
train categories to distinguish between services. Rail travel is very popular in
Japan (
per inhabitant and year in 2009) and
Switzerland ( per inhabitant and year in 2019).
Heritage trains (often operating on
heritage railways) and
luxury trains are
tourism-oriented rail services carrying passengers over scenic and/or historic routes.
Inter-city and high-speed rail Inter-city rail is long-haul passenger services that connect multiple urban areas. They have few stops, and aim at high average speeds, typically only making one of a few stops per city. These services may also be international, including overnight trains with
sleeping cars or
couchettes.
High-speed rail is passenger trains operating significantly faster than conventional rail—typically defined as at least . The most predominant systems have been built in
Europe and East Asia (
China,
Japan), and compared with air travel, offer long-distance rail journeys as quick as air services, have lower prices to compete more effectively and use
electricity instead of combustion. While East Asian countries have excelled at high-speed rail, the Southeast Asian countries are laggards. Trains that are faster than conventional trains but slower than high-speed trains are sometimes referred to as
higher-speed trains. NSW XPT passenger train Galong, NSW.jpg|
New South Wales XPT intercity rail in
Galong, New South Wales Shinkansen N700 & 500 (8086228483) (cropped).jpg|Two types of
Shinkansen high-speed trains in Japan File:Vande Bharat Express around Mumbai.jpg|
Vande Bharat Express near
Chennai, Tamil Nadu Higher-speed rail
Urban rail transit Urban rail transit is an all-encompassing term for various types of local rail systems, such as for example
trams,
light rail,
rapid transit,
people movers,
commuter rail,
monorail,
suspension railways and
funiculars.
Commuter and regional rail Commuter rail is part of an urban area's public transport. It provides faster services to outer
suburbs and neighboring
satellite cities. Trains stop at
stations that are located to serve a smaller suburban or town center. The stations are often combined with
shuttle bus or
park and ride systems, and may also be equipped with
bicycle parkings or
stations. Frequency may be up to several times per hour, and commuter rail systems may either be part of the national railway or operated by local transit agencies. Common forms of commuter rail employ either
diesel electric locomotives, or
electric multiple unit trains. They typically use single-level
railroad cars, which allow for faster boarding/deboarding times, though some systems also use
bilevel rail cars. Some commuter train lines share a railway with
freight trains. Regional rail links towns and villages with each other. They typically run on an hourly or half-hourly basis and call at every station. At larger train stations, connections to long-distance trains are commonly offered. Some
S-Bahn systems in
German-speaking countries are comparable to regional trains. Some regional trains operate in
mountainous areas. File:PRASA X'trapolis Mega.jpg|
Metrorail train in
Cape Town File:VLocity at Sunshine station.jpg|
V/Line regional rail in
Victoria File:ÖBB 4748 005 Sulz-Röthis 2311.jpg|
Regional S-Bahn train in
Vorarlberg Rapid transit and light metro A
Metro rapid transit (MRT) railway system (also called a metro, underground, heavy rail, or subway) operates in an urban area with high capacity and frequency, and
grade separation from other traffic. Heavy rail is a high-capacity form of rail transit, with 4 to 10 units forming a train, and can be the most expensive form of transit to build. Modern heavy rail systems are mostly driverless, which allows for higher frequencies and less maintenance cost. Tram mestre.jpg|
Translohr Mestre in
Venice,
Italy Yibin ART System 10 12 45 035000.jpeg|
Yibin ART System in
Sichuan,
China Tram Ct-Fd.png|Rubber-tyred tram in
Clermont-Ferrand Rack railway Rack railways, also known as cog railways or cogwheel railways, provide public transport in mountainous regions, in both rural and urban areas. They are characterized by an additional middle rack rail and one or more
cogwheels (
rack and pinion) to overcome steep
gradients, as opposed to conventional
adhesion railways. Zahnradbahn Stuttgart Liststraße 1102 2.JPG|A
rack railway with bicycle trailer in
Stuttgart Rheineck - Walzenhausen Mountain Railway (24961353265).jpg|A rack railway in
Switzerland FGC A GTW 03.jpg|
Vall de Núria Rack Railway in
Catalonia Monorail Monorail systems generally use overhead tracks, similar to an
elevated railway above other traffic. The systems are either mounted directly on the track supports or put in an overhead design with the train suspended. Maglevs use
electromagnets instead of wheels on rail.
Monorail systems are used throughout the world (especially in Europe and east
Asia, particularly
Japan), but apart from public transit installations in
Las Vegas and
Seattle, most North American monorails are either short shuttle services or privately owned services (with 150,000 daily riders, the
Disney monorail systems is a successful example). Set 30 Hang Tuah, 2023 (01).jpg|A
monorail in
Kuala Lumpur ECOBEE.jpg|A
maglev at
Incheon Airport, South Korea 2010-09-06 Wuppertaler Schwebebahn 111408.jpg|
Suspension railway in
Wuppertal Personal rapid transit and people mover Personal rapid transit (PRT) is an automated cab service that runs on rails or a
guideway. This is an uncommon mode of transportation (excluding
elevators) due to the complexity of automation. A fully implemented system might provide most of the convenience of individual automobiles with the efficiency of public transit. The crucial innovation is that the automated vehicles carry just a few passengers, turn off the guideway to pick up passengers (permitting other PRT vehicles to continue at full speed), and drop them off to the location of their choice (rather than at a stop). Conventional transit simulations show that PRT might attract many auto users in problematic medium-density urban areas. A number of experimental systems are in progress. One might compare personal rapid transit to the more labor-intensive
taxi or
paratransit modes of transportation, or to the (by now automated)
elevators common in many publicly accessible areas.
Automated people mover (APM) are a special term for grade-separated rail which uses vehicles that are smaller and shorter in size. There are two sub-groups of CPT—
gondola lifts and
cable cars (railway). Gondola lifts are supported and propelled from above by cables, whereas cable cars are supported and propelled from below by cables. While historically associated with usage in
ski resorts, gondola lifts are now finding increased consumption and utilization in many urban areas—built specifically for the purposes of mass transit. Many, if not all, of these systems are implemented and fully integrated within existing public transportation networks. Examples include
Metrocable (Medellín),
Metrocable (Caracas),
Mi Teleférico in
La Paz,
Portland Aerial Tram,
Roosevelt Island Tramway in New York City, and the
London Cable Car.
Funicular is a type of
cable railway system that connects points along a railway track laid on a steep slope. The system is characterized by two counterbalanced carriages (also called cars or trains) permanently attached to opposite ends of a haulage cable, which is looped over a pulley at the upper end of the track
Hovertrains are also cable-driven but use a cushion pad instead of rails. Examples are the
U-bahn in the car-free resort town of
Serfaus, or previously the
Narita Airport Terminal 2 shuttle in Japan and the
Duke Hospital MRT in North Carolina. File:CH Furtschellas aerial tram.jpg|An aerial tram in
Engadin, Switzerland File:Yllastunturi Gondola Lifts 20090301.JPG|Gondola lifts in
Ylläs ski resort in
Lapland, Finland File:11 Cable Car on Powell St crop, SF, CA, jjron 25.03.2012.jpg|Cable car in
San Francisco Ferry A
ferry is a boat used to carry (or
ferry) passengers, and sometimes their vehicles, across a body of water. A
foot-passenger ferry with many stops is sometimes called a
water bus. Ferries form a part of the public transport systems of many waterside cities and islands, allowing direct transit between points at a capital cost much lower than bridges or tunnels, though at a lower speed. Ship connections of much larger distances (such as over long distances in water bodies like the
Mediterranean Sea) may also be called ferry services. File:Accademia-vaporetto-stop-20050525-016.jpg|Water bus (
vaporetto) at bus stop in
Venice, Italy File:James Stirling, Fremantle, 2016 (01).jpg|
Captain Cook Cruises Western Australia entering into
Fremantle Integration with cycling Many cities around the world have introduced bikes, electric bikes, and scooters to their public transport infrastructure. Good cycling infrastructure, including good parking at stations, makes it feasible for people to travel further to public transport stations. File:Cycle superhighway 6 at Blackfriars.jpg|Cycle Superhighway CS6 is part of
London's Cycle Network infrastructure. File:ETricks C01 electric bike.jpg|eTricks C01, electric bicycle made in
France ==Operation==