FIELD: maintenance of transport facilities. SUBSTANCE: passage- way in form of covered space is organized as route of transport facility when the latter is in motion. Marking of transport facility motion route is made in middle of passageway on rolling surface. Quick-action gas analyzers connected to computer are installed at definite places between rolling surface and transport facility bottom. Computer receives information on content of harmful substances and smoke and prepares information on changing the content of harmful substances in definite volume and space for given moments of time. EFFECT: provision for nondestructive test of release system.
