Path alteration

Based on the contracts of use of the infrastructure/path agreements, applicants can expect that an allocated path is available up to its operation. However, in several cases, it may be necessary for infrastructure managers and allocation bodies (Hereafter IMs) to alternate, adjust, replace1 or withdraw already allocated paths. This activity is the so-called “Alteration of an Allocated Path” (or short “Path Alteration”). However, the need for path alteration shall be reduced to a minimum. This subject has been tackled in the project “Timetable and Capacity Redesign” (TTR). A path alteration may refer to one single running day, several days or all remaining days in a yearly timetable; It is also possible to alter the whole path section or just a part of it. It applies to paths in a yearly timetable and to those booked using the short-term planning process as well.