At what speed must movements be made within track out of service limits?

Movements within track out of service limits must be made at restricted speed to ensure safety. Restricted speed is defined as the maximum allowable speed that allows a train to stop within half the range of visibility. This is particularly important in areas where track conditions may be uncertain, as it allows for greater control and reaction time in case of obstacles or other hazards that may be present on the track.

When a track is out of service, it may not have been inspected or cleared for normal operations, which further necessitates lower speeds to mitigate risks. The focus is on ensuring the safety of personnel and equipment, as well as maintaining the integrity of the rail network during such conditions. Choosing a higher speed could pose significant safety risks, as it would not allow sufficient time for the train crew to respond to any unexpected situations.

In contrast, normal speed, maximum speed, and slow speed are not appropriate for this scenario because they either do not sufficiently prioritize safety or do not align with operational protocols for areas designated as out of service.