General Railway Signals

 
Below are the various types of GRS signals. Click on the Type to look at this signals data sheet. Data sheets contain basic signal data, railroads that used these signals, lenses and other pertinent data.  We have attempted to provide a photo and/or drawing of each style of signal. The photos are either from "the wild" where a signal is in service or of the signal within a collection.
 
Type Description Style
 
 
 
A
Early transit signal, both single and doublet lenses.
Color Light
AN
"A" variation transit signal, larger outer lens.
Color Light
AT
Modern "A" variation for transit use.
Color Light
AW
Transit signal, also used as a wayside dwarf signal, standard lenses.
Color Light
B
Position light wayside high signal
Position Light
C
Position light wayside dwarf signal.
Position Light
D
Stackable color light signal, both wayside high and dwarf.
Color Light
E
Horizontal color light, uses "D" components.
Color Light
F
Stackable color light wayside high.
Color Light
FA
Stackable color light wayside dwarf
Color Light
G
Triangular cluster color light, wayside high signal.
Color Light
L
Triangular cluster color light, wayside high and dwarf, large case for transformer.
Color Light
M
Two aspect "sister" to the Type L, wayside high and dwarf signal, large case for transformer.
Color Light
MD
Two aspect wayside dwarf signal, large case for transformer and relays
Color Light
ME
Same as Type "MD" with small case.
Color Light
MF
Triangular cluster wayside dwarf signal.
Color Light
P
Two aspect switch point indicator, used at turnouts, hump yards.
Color Light
S/SA/SA1/ SC/SD
Searchlight signal, numerous adaptations, see tech. sheet. Electromagnet relay changes indication.
Color Light
U
Color position light wayside high signal, variations for vertical and horizontal applications.
Color Position Light
V
Color position light wayside dwarf signal.
Color Position Light
Enhanced version of the Type "V".
Color Position Light
VB
Transit signal that uses lamp units from Type "VA"
Color Light
W
Fixed marker typically used with searchlight configuration.
Color Light

Signal Definitions

Next to Union Switch and Signal

Visit the official GRS (now Alstom) Site.

Back to Index

This site is for educational use only and is not affiliated with any of the above companies or their corporate successor. No attempt has been made to compare or contrast any of the information contained within. Copyright 2008.

Updated: 07/26/2008