What is the common distance between signal survey plates along a railway?

The common distance between signal survey plates along a railway is typically in the range of 1000-1500 feet. This distance is established to ensure effective signal visibility and reliability, which are critical for maintaining safe operations on the railway. Signal survey plates serve as markers for where signals should be placed, allowing for consistent application of signal placement guidelines based on the distance trains need for visibility and reaction time. Placing them beyond 1500 feet could lead to challenges in signal identification, while distances shorter than 1000 feet might not provide adequate information for positioning signals in accordance with operational standards. Consequently, the 1000-1500 feet range strikes a balance between safety and operational efficiency, which is why this answer is the most appropriate.