File:American Railway Association Signal Aspects.jpg
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Size of this preview: 800 × 349 pixels. Other resolutions: 320 × 140 pixels | 640 × 279 pixels | 1,024 × 447 pixels | 1,280 × 559 pixels | 4,400 × 1,920 pixels.
Original file (4,400 × 1,920 pixels, file size: 1.63 MB, MIME type: image/jpeg)