A History lesson for People that think History doesn't matter:

What's the big deal about railroad tracks?

The US standard railroad gauge (distance between the rails) is 4 feet, 8.5 inches. That's an exceedingly odd number.

Why was that gauge used?

Well, because that's the way they built them in England, and English engineers designed the first US railroads.

Why did the English build them like that?

Because the first rail lines were built by the same people who built the wagon tramways, and that's the gauge they used.