 | Color-position light signals are the standard signal used along the CSX trackage formerly owned by the Baltimore and Ohio. This close-up shows the fresnel lenses used as outer lenses on these signals. |
| Bracket signals are used in areas where twotracks must be signalled but the size of the right-of-way prohibits spacing of the tracks to permit separate signals on each one. This signal is located near Savage, Maryland. |
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 | Dwarf signals are used in yards, terminals and other areas where the number of tracks are such that high signals could be misunderstood. Dwarfs are sized so that they can be placed right beside the track whose traffic they control. This picture was taken behind Camden Yards in Baltimore. |
Inside a signal lamp |
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| Baltimore and Ohio Railroad drawing |
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