What is End Approach?

What is End Approach?

• A. A device to slow down trains
• B. The distance to the next station
• C. The method to align pantographs
• D. The gradual slope or incline of the third rail at the beginning and end of each third rail section

Answer: (D)

End Approach is the gradual slope or incline of the third rail at the beginning and end of each third rail section. This ramp lets the train’s current collector shoe smoothly transition as it moves from one energized rail segment to the next, preventing a sudden vertical change that could cause arcing, increased wear, or loss of power. The smooth transition helps maintain continuous electrical contact and reduces mechanical stress on the shoe and rail. It isn’t about slowing trains, the distance to the next station, or pantograph alignment; those describe different concepts. The defined ramp at the ends of each third rail section is the feature that End Approach refers to.

End Approach is the gradual slope or incline of the third rail at the beginning and end of each third rail section. This ramp lets the train’s current collector shoe smoothly transition as it moves from one energized rail segment to the next, preventing a sudden vertical change that could cause arcing, increased wear, or loss of power. The smooth transition helps maintain continuous electrical contact and reduces mechanical stress on the shoe and rail.

It isn’t about slowing trains, the distance to the next station, or pantograph alignment; those describe different concepts. The defined ramp at the ends of each third rail section is the feature that End Approach refers to.