For the English full text of the article please see the attached PDF-File (English version follows Russian version).ABSTRACT The semantics and essence of the concept of «transport accessibility», its use in featured works and legal acts of the Russian legislation are considered. The main aspects of transport accessibility (accessibility of territories, objects of transport infrastructure, vehicles, transportation services) are identified. Qualitative characteristics that should be reflected in the standards of transport service are established. The definition of «accessibility of public urban transport services» is proposed as property of a city’s transport system to allow an unlimited range of individuals to travel and to carry permitted hand luggage and baggage in accordance with the terms of a public transportation contract for a passenger and with the conditions of a transport license issued to a carrier, mandatory legal requirements for the carrier, as well as with standards and rules accepted and declared by the carrier. Keywords: transport, accessibility, sustainable development, service quality, terminology, concept content.