Method for monitoring transport vehicles

The invention relates to a method for inspecting the condition of a transport vehicle, in which a transport vehicle (5) which moves on wheels is photographed using one or more linear cameras (1), the object of the photograph is identified from the obtained pictures and the condition of its structure is determined by comparing the information obtainded from the picture data, such as identification data, dimensions, shapes and colors, to information previously saved about a corresponding object. A characteristic of a method for inspecting the condition of a transport vehicle, according to the invention, is that the picture formed using a linear camera (1) is modified programmatically to the correct dimensions on the basis of information previously saved in the memeory of the inspection equipment.