Question: 2 . When a Three - color Light wayside signaling system is used ( As depicted on page 1 4 4 of the The Railroad

2. When a Three-color Light wayside signaling system is used (As depicted on page 144 of the The Railroad What it is and What it does), explain what a green light indication means? Explain what a yellow light indication means? Explain what a red light indication means?

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