Le transport désigne le déplacement d'objets, de marchandises, ou d'individus (humains ou animaux) d'un endroit à un autre. Ces modes de transport incluent l'aviation, le chemin de fer, le transport routier, le transport maritime, le transport par câble, l'acheminement par pipe-line et le transport spatial. Le mode dépend également du type de véhicule ou d'infrastructure utilisé. Les méthodes de transport peuvent inclure l'automobile, la bicyclette, le bus, le train, le camion, la marche à pied, l'hélicoptère, ou l'avion. Le type de transport peut se caractériser par son appartenance au secteur public ou privé.
Public transport (North American English: public transportation or public transit) is a shared passenger transport service which is available for use by the general public, as distinct from modes such as taxicab, car pooling or hired buses which are not shared by strangers without private arrangement.
Public transport modes include buses, trolleybuses, trams and trains, rapid transit (metro/subways/undergrounds etc) 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 runs to a scheduled timetable with the most frequent services running to a headway. Share taxi offers on-demand services in many parts of the world and some services will wait until the vehicle is full before it starts. Paratransit is sometimes used in areas of low-demand and for people who need a door-to-door service.
There are distinct differences in urban public transit between Asia, North America, and Europe. In Asia, mass transit operations are predominately run by profit-driven privately owned and publicly traded mass transit and real estate conglomerates. In North America, mass transit operations are predominately run by municipal transit authorities. In Europe, mass transit operations are predominately run by outsourced private transport operators.