What does 'Narrow gauge single track' indicate about the distance between rails?

What does 'Narrow gauge single track' indicate about the distance between rails?

• A. Distance is smaller than standard gauge
• B. Distance equals standard gauge
• C. Distance is larger than standard gauge
• D. There is no standard gauge

Answer: (A)

Gauge is the distance between the two rails. When a line is described as narrow gauge, that distance is smaller than the standard gauge, which is about 1,435 millimeters (4 feet 8.5 inches). Using a smaller spacing lets lighter trains run and makes it easier to build tighter curves, which is common in mountainous or cost-conscious networks. The fact that it’s a single track doesn't affect the gauge itself; it just means there’s one line for traffic in both directions. So, the distance between rails is smaller than standard gauge.

Gauge is the distance between the two rails. When a line is described as narrow gauge, that distance is smaller than the standard gauge, which is about 1,435 millimeters (4 feet 8.5 inches). Using a smaller spacing lets lighter trains run and makes it easier to build tighter curves, which is common in mountainous or cost-conscious networks. The fact that it’s a single track doesn't affect the gauge itself; it just means there’s one line for traffic in both directions. So, the distance between rails is smaller than standard gauge.