How far in meters before a Temporary Speed Restriction (TSR) is a warning board placed?

A warning board for a Temporary Speed Restriction (TSR) is typically placed 2500 meters before the actual TSR site. This distance allows for adequate warning to train operators, ensuring they have sufficient time to reduce speed and comply with the lower speed limit designated by the TSR. The purpose of this advance notice is to promote safety, as it gives the driver ample time to respond appropriately to the upcoming change in speed. Ensuring that trains can safely transition to a lower speed helps minimize risks associated with sudden braking or accidents, particularly in areas where track maintenance or other hazards may be present.