How Railroad Crossings Work

How do they know when a train is on the way? Despite the hazard they pose, trains have to coexist with our other forms of transportation. Next time you pull up to a crossbuck, take a moment to appreciate the sometimes simple, sometimes high-tech, but always quite reliable ways that grade crossings...

18 min - How Things Work - Practical Engineering

More: How It Works documentaries

Read Deeper: How It Works

1. The Way Things Work Now by David Macaulay (4.3/5) - View on Amazon
2. How Things Work by Louis A. Bloomfield - View on Amazon
3. Thing Explainer by Randall Munroe (4.2/5) - View on Amazon
4. What If? by Randall Munroe (4.3/5) - View on Amazon

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