This European standard defines the specific technical railway requirements for working with machines and other vehicles used for construction, maintenance and inspection of track, structures, track formation and fixed electric traction equipment as specified in prEN 14033-1. This European standard applies to all railbound machines and other vehicles - referred to as machines - working exclusively on the railway (utilising friction between the rail and rail wheels) and used for construction, maintenance and inspection of track, structures, infrastructure and fixed electric traction equipment. Different regulations are applicable for working on infrastructures with narrow gauge or broad gauge lines, lines of tramways, railways utilising other than adhesion between the rail and rail wheels and underground infrastructures. This standard covers the safety requirements for the railway specific problems for working on different infrastructures. These application of these requirements is the object of a verfication procedure which does not from part of this standard, but an Annex J is included for information. In all cases an authorisation to work is required to access the infrastructure. This standard is also applicable for machines that in working position are partly supported on the ballast or the formation.