OpenRailwayMap/Tagging in the United Kingdom
This page is a draft and only contains suggestions.
Tracks

ref=SBR
(marked on a bridge over the line)
On Network Rail lines, ref=*
can hold the Engineer's Line Reference (ELR). For instance ref=MLN1
or ref=BGK
. This is usually marked on bridges and level crossings. An ELR and mileage together define a location on the Network Rail network.
The standard GB electrification system, as defined by GL/RT1210, is electrified=contact_line
, voltage=25000
, frequency=50
.
“Light” railways
Many railways in Great Britain have names ending in “Light Railway” because they were authorised under the Light Railways Acts 1896 and 1921. That doesn’t necessarily mean that they should be tagged railway=light_rail
: most of them are operated like main-line railways and should be tagged railway=rail
or railway=narrow_gauge
.
Tunnels
Tunnels on Network Rail infrastructure usually have names displayed along with the length of the tunnel at the tunnel portals. This can be tagged as tunnel:name=*
.
Signals
All signals are tagged with
railway=signal
railway:signal:direction=*
railway:signal:position=*
position of the signal in relation to the railway line direction
Main signals
Combined main signal
-
light main signal (combined lenses)
-
light main signals (combined) with junction signals (open this image and zoom in)
railway:signal:main=GB-NR:main
railway:signal:main:form=light
railway:signal:main:design=combined
- suggested:
railway:signal:main:states=red;green;yellow;flashing_yellow;double_yellow;flashing_double_yellow
Only enter the possible aspects at this signal!
Individual main signal
-
light main signal (individual lenses) with a junction signal
railway:signal:main=GB-NR:main
railway:signal:main:form=light
railway:signal:main:design=individual
- suggested:
railway:signal:main:states=red;green;yellow;flashing_yellow;double_yellow;flashing_double_yellow
Only enter the possible aspects at this signal!
SPAD signal
-
SPAD indicator L22
Semaphore signals
-
Semaphore main signals
Junction signals
Feather
railway:signal:route=GB-NR:junction
railway:signal:route:form=light
railway:signal:route:design=feather
railway:signal:route:states=*
Enter the possible aspects at this signal, possibly includingoff
separated by;
. For position numbers see figure 6.42 at railsigns.uk:position_1
top-left indicatorposition_2
left indicatorposition_3
bottom-left indicatorposition_4
top-right indicatorposition_5
right indicatorposition_6
bottom-right indicatoroff
If the junction signal can be off
Theatre
railway:signal:route=GB-NR:junction
railway:signal:route:form=light
railway:signal:route:design=theatre
railway:signal:route:states=*
Enter the possible aspects (letters/numbers), possibly includingoff
separated by;
. For exampleC;S;off
.
Distant signals
Light signals
Semaphore signals
Repeated main signals
Banner signal
Off signal (at stations)
Shunt signals
Light signals
Shunt signal
Limit of Shunt signals
railway:signal:shunting=GB-NR:limit
railway:signal:shunting:form=light
railway:signal:direction=backward
Limit of shunt usually on the 'wrong' side of the track, so they're backwards from the normal direction.
Departure signals
Right Ahead signal
Crossing signals
Light signals
Advance Warning Board
Speed signals
Permissible speed indicator
railway:signal:speed_limit=GB-NR:speed_limit
railway:signal:speed_limit:form=sign
railway:signal:speed_limit:speed=*
The value shown on the sign
Diverging permissible speed indicator
railway:signal:speed_limit=GB-NR:speed_limit
railway:signal:speed_limit:form=sign
railway:signal:speed_limit:speed=*
The value shown on the signrailway:signal:speed_limit:turn_direction=*
right
Applicable for right turnleft
Applicable for left turnright;left
Applicable for both right and left turns
Warning indicator
railway:signal:speed_limit_distant=GB-NR:warning
railway:signal:speed_limit_distant:form=sign
railway:signal:speed_limit_distant:speed=*
The value shown on the sign
Diverging warning indicator
railway:signal:speed_limit_distant=GB-NR:warning
railway:signal:speed_limit_distant:form=sign
railway:signal:speed_limit_distant:speed=*
The value shown on the signrailway:signal:speed_limit:turn_direction=*
right
Applicable for right turnleft
Applicable for left turnleft;right
Applicable for both right and left turns
Signal Documentation
- railsigns.uk ( Archived here)
- signalbox.org
- Wikipedia
- Official wording can be found at map [ dead link ] by National Rail. Don't copy the map data to OSM, just have a look how NR names the signal types!
Signal boxes

railway=signal_box
name=Downham Market
building=yes
Signal boxes are usually labelled with their names, and sometimes with their signal prefixes as well. The name can obviously be tagged using name=*
, and the prefix could be tagged with railway:ref=*
.