 | Color-position light signals were the standard signal used along the CSX trackage formerly owned by the Baltimore and Ohio. This close-up shows the internal fresnel outer lenses on one such signal at Annapolis Junction, Maryland. |
 | The CPL signals are gradually being replaced by nondescript signals used by most other railroads in the United States, as shown to the left, thereby ending a long tradition of individuality. These signals are at Lansdowne, Maryland. |
| Bracket signals are used in areas where two tracks 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 dwarf signal lamp |
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| Baltimore and Ohio Railroad drawing |
Inside a CPL signal lamp |
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| General Railway Signal drawing © 1937 |
| Don't tell me what the lamps of the new signals look like; I don't want to know. |
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