Posted by onondagafred23a on February 3, 2007  I like the Blue signal aspect!! Posted by Dan K on February 5, 2007  Nice pic! What exactly does the blue aspect mean? Posted by Dave Schauer on February 6, 2007  The "blue" is tinting in the lens and it actually looks white when illuminated. When on it basically means "restricting, proceed at restricted speed, not exceeding per scribed speed through turnout."

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