Main Signals
The main signal can have any of the following aspects:
| Aspect | Meaning | Old system (Helsinki area) | |
|---|---|---|---|
| Stop | The signal must not be passed. | ||
| Proceed | The signal may be passed with the maximum allowed speed. | ||
| Proceed 35 | The signal may be passed and the maximum speed of 35 km/h (22 mph) is in effect from the next switch, which may lead to the diverging route. An ATC cab display may authorize a higher speed, typically 80 km/h (50 mph). The speed is in effect until the next main signal or after leaving the station area. The route may also lead to an occupied track section, but only if the driver has received a preliminary announcement. | ||
If a main signal doesn't protect any switches or the speed restriction on a diverging route is the same as straight route, the signal doesn't need to show the Proceed 35 aspect and therefore the yellow bottom light may be absent. The two lamp version of the old system has the lights reversed, i.e. red at the top and green at the bottom.
Read more about this topic: Finnish Railway Signalling
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