Systems and of the methods for allowing a taxiing route to be established over an airport area are described. In one embodiment, the method comprises input of an instruction representative of a succession of names of passing points representing the taxiing route to be created, each passing point name being composed of alphanumeric characters, the succession of the names of passing points not comprising separators allowing them to be identified one by one. The method also comprises decomposition of the instruction by a lexical analysis device into at least one succession of credible names of passing points. The method further comprises verification for each succession that the corresponding route is compatible with the connectivities existing between the various airport elements of the taxiing clearance corresponding to the succession, in the case where there exists one and only one credible route, display of the said route on a display device.