O-Scale | NS and B&O, Color Position Light Style
COLOR POSITION LIGHT SIGNALS
Originally the N&W was owned by the PRR and used the same Position Light Signals. When it broke from the PRR it continued to use the PRR signals until about 1962. After a serious accident blamed on signal visibility, the N&W changed over to the COLOR POSITION LIGHT SIGNAL. They omitted the center light and at the same time used green, yellow and red lights. These were similar to other signals, but still they still retained the position aspects.
The B&O also used a basic COLOR POSITION LIGHT SIGNAL, but added additional marker lights to change the aspects. These signals are also used today on the North East Corridor.
Atlas #6911 COLOR POSITION LIGHT SIGNAL
aTLAS #6912 COLOR POSITION LIGHT SIGNAL 4-PACK
Atlas will be offering the single target ground signal with the lower marker light (#6911). The signal is an intermediate signals used as ABS block signals. It will display normal speed indications only. These are indicated in the TCL as a circled target number such as “1W”. This means that this is a full target and will display 3 “colors” or aspects. The automatic sequence will be CLEAR, STOP, APPROACH and CLEAR. Using the lower marker light will replace the STOP with STOP AND PROCEED if desired. If you need an absolute signal, such as at a junction, the lower marker light would not be used.