What does railway maintenance window mean?

[BraxtonLee]

Railway maintenance window refers to a designated period during train operations when no train schedules are arranged, reserved specifically for maintenance and construction work. Here are some details about railway maintenance windows: 1. Classification by purpose: Construction window and maintenance window. 2. Time regulations are as follows: (1) For high-speed railways (both construction and maintenance), the window should in principle be no less than 240 minutes. (2) For conventional-speed railway construction windows: during technical renovation projects, major repairs of tracks and bridges, large-scale maintenance machinery operations, and major repairs or renovations of overhead contact lines, the window should be no less than 180 minutes. (3) For conventional-speed railway maintenance windows: double-track lines should have no less than 120 minutes, while single-track lines should have no less than 90 minutes.