Transportation system for people and/or things, comprising a system constituted by guideways or rails and at least one vehicle suited to transport one or more persons and/or things and constrained so that it moves on said rails, said vehicle comprising a structure supported by wheels (81, 82) wherein: • said at least one vehicle comprises one or more drive wheels (81, 82); • said rail system is a monorail type, wherein said rail is made up of modular segments joined together and completely recessed in the road surface, and wherein each one of the modular segments that make up said rail has the shape of a box, comprising a lower side or base, two lateral walls and an upper side on which a longitudinal groove is provided, and wherein the inside of said rail defines the guide in which a part of at least one guide system constrained to said vehicle slides; • under the structure of said vehicle there is said at least one guide system suited to be partially housed in said guide of the rail through said longitudinal groove, and wherein said at least one guide system in turn comprises a support or shank suited to be inserted through said groove, the end of said shank being constrained to an element suited to slide in said main guide located inside the rail, and where said road surface is a road or a cycle path or a dedicated road, and where said rail is positioned in said flat road surface, without depressions, characterised in that each of the drive wheels (81, 82) is connected to an electric motor, and at least one battery suited to supply power to said electric motor; wherein said vehicle comprises two drive wheels and two pivoting wheels, and where said guide system is mounted below the vehicle, in correspondence with the longitudinal central axis of the vehicle, and wherein said system comprises a closing system of said longitudinal groove of the rail, where said closing system in turn comprises at least one or preferably a pair of opposite closure partitions (91, 92), arranged longitudinally in the vicinity of said longitudinal groove of the rail, and where elastic means keep said closure partitions (91, 92) counterposed one against the other, so as to hermetically seal the groove and counteract the deformation and lateral displacement of said closure partitions (91, 92) upon the passage of said shank of the guide system which slides in the rail, and where said closure partitions (91, 92) can only be deformed horizontally and transversally with respect to the length of the rail and the longitudinal groove. • said at least one vehicle comprises one or more drive wheels (81, 82); • said rail system is a monorail type, wherein said rail is made up of modular segments joined together and completely recessed in the road surface, and wherein each one of the modular segments that make up said rail has the shape of a box, comprising a lower side or base, two lateral walls and an upper side on which a longitudinal groove is provided, and wherein the inside of said rail defines the guide in which a part of at least one guide system constrained to said vehicle slides; • under the structure of said vehicle there is said at least one guide system suited to be partially housed in said guide of the rail through said longitudinal groove, and wherein said at least one guide system in turn comprises a support or shank suited to be inserted through said groove, the end of said shank being constrained to an element suited to slide in said main guide located inside the rail,