Disclaimer: It is unknown to the author of this page
- whether the boards "stop", "caution" and "proceed" were in fact circular, and
- whether they were replaced by more modern types earlier than 1935.
The track behind the board is inaccessible. On the line, the board would be placed 250-500 m (275-550 yds) in advance of the inaccessible track section.
This board was only used when no ordinary trains were expected; otherwise the signal had to be given by hand.
Proceed at reduced speed. Expect
- a track section with speed restriction within 250-500 m (275-550 yds) of this point, or
- warning board "Stop" within 500 m (550 yds) of this point.
The exact purpose or speed limit was not indicated.
This board was only used when no ordinary trains were expected; otherwise the signal had to be given by hand.
Speed restriction ends; proceed at prescribed speed.
The track is occupied by unremovable vehicles or otherwise inaccessible.
This board was only used in station areas.
The rulebook of 1935 introduced a distinction between steam trains (i.e. ordinary trains, including motor units) and electric trains (for suburban traffic). Apparently, the purpose was to optimize speed limits and positioning of speed boards, taking into consideration that electric trains were shorter and had better braking capabilities than ordinary trains. The special boards for electric trains were abandoned no later than 1944.
The track behind the board is inaccessible. On the line, the board would be placed 400 m (440 yds) in advance of the inaccessible track section.
Steam trains Electric trains
Proceed at reduced speed. Expect warning board "Stop" 400 m (440 yds) beyond this point.
Steam trains Electric trains
On the line: Prepare to proceed at speed indicated. The speed restriction begins 400 m (440 yds) beyond this point and is not indicated further. For permanent speed restrictions, the speed board for electric trains would be placed only 150 m (165 yds) in advance.
In a station: Proceed at speed indicated. The speed restriction begins immediately.
Steam trains Electric trains
When placed at an entry signal: Prepare to proceed at reduced speed through certain tracks. The speed restriction is further indicated by a speed board as described above.
Steam trains Electric trains
When placed at an entry signal: Proceed at speed indicated through any track. The speed restriction is not indicated further.
Steam trains Electric trains
When placed at a switch limit board: Prepare to proceed at reduced speed somewhere along the line. The speed restriction is further indicated by a speed board as described above.
Steam trains Electric trains
When placed at a switch limit board: Proceed at speed indicated until next station. The speed restriction is not indicated further.
Steam trains Electric trains
Speed restriction has ended; proceed immediately at prescribed speed.
This board would usually be placed next to the "Caution" board for the opposite direction of travel, i.e. 400/150 m (440/165 yds) after the end of the speed restriction.
The track is occupied by unremovable vehicles or otherwise inaccessible.
This board was only used in station areas.