What is the purpose of the V-shaped rail between two straight rails on a railway? - Quora

How is curved rail track made? The track appears curved when seen from a distance, but it is pretty straight when seen at the curve itself? - Quora

How do trains turn? - Quora

What is your favorite NYC subway line and why? - Quora

Railroad switch - Wikipedia

Why do they often use more than one train engine to pull a train, rather than building one big enough engine to do the work of two or three? - Quora

What is the purpose of the V-shaped rail between two straight rails on a railway? - Quora

What is the purpose of the V-shaped rail between two straight rails on a railway? - Quora

What is the purpose of the V-shaped rail between two straight rails on a railway? - Quora

Why do train tracks carry an electrical voltage between them? - Quora

How advanced is high-speed rail in China? - Quora

How does an electric train get power from the third rail? - Quora

What does the fouling mark in railway tracks signify? - Quora