T-12
定义: The point twelve weeks before a possession when the timetable is finalised and access is confirmed. Changes after T-12 become progressively more difficult and costly.
示例: The worksite was confirmed at T-12 to allow train planning to proceed
定义: The point twelve weeks before a possession when the timetable is finalised and access is confirmed. Changes after T-12 become progressively more difficult and costly.
示例: The worksite was confirmed at T-12 to allow train planning to proceed