On the LRI-drawings it is shown what the visibility is to the tramline and where there are inspection paths next to the tramline. The LRI-drawings give information on where under safety regime A you can walk, work or cross the tramline in safety with a minimum visibility of 15 seconds.
The LRI-drawings are static. In practice the situation can be different. If you are of opinion that you cannot work safely, where the LRI-drawing states you can, do not start the works and contact your superior.