What is the maximum brake pipe reduction for speed control?

The maximum brake pipe reduction for speed control is 15 psi or less. This limit is important for maintaining safe train operations while allowing for gradual speed adjustments. Maintaining a reduction within this range helps to prevent abrupt changes in speed, which can cause risks such as a derailment or loss of control over the train dynamics. It facilitates smoother transitions when slowing down or managing speed, which is crucial particularly in areas where precise control is required, such as near stations or in hilly terrain.

Choosing a reduction higher than 15 psi may lead to sudden deceleration, which can be dangerous, especially in heavy freight operations or when carrying passengers. Therefore, keeping the brake pipe reduction at or below this level ensures compliance with safety protocols and enhances overall train handling.