Table of Contents

Aarhus Letbane

Signals

Aarhus Letbane use BOStrab signals and some BOStrab signs along with SR75 signs. SR75 signs are primarily used on Odderbanen and Grenåbanen - the two former railways, rebuilt to a light rail line.

Main signals

BOStrab: Hauptsignale

Signals H0-2 are main signals which the driver must follow. Failure to do so will have consequences.
Signals V0-2 are pre-signals (or repeaters) telling the driver what the following main signal is showing. This signal can be passed even if showing double yellow, as it's merely a repeater.

Stop - signal H0

This signal means you must stop before the signal. Failure to do so will result in an ATP emergency brake.


Go straight - signal H1

This is a regular “go” light, which means you can continue with line speed or what the ATP allows you to.


Go in deviating branch - signal H2

This signal means you may continue to either direction through a switch which is set to the deviating branch, typically when entering a station's second track on a single track line.


Pre-signals

BOStrab: Vorankündigungssignale

Expect stop - signal V0

This signal tells the driver that the main signal is showing Stop


Expect go straight - signal V1

This signal tells the driver that the main signal is showing Go straight


Expect go in deviating branch - signal V2

This signal tells the driver that the main signal is showing Go in deviating branch


Tram signals

BOStrab: Fahrsignale

There are five tram signal aspects which are placed on shared or special tracé on Urban Line. These signals consist of either three or four lights on the signal itself. The tram signals are synchronised with the regular traffic signals for cars. The signal housings are SWARCO Alustar


Stop - signal L1

This signal means you must stop before the signal


Stop - signal L2

This signal means you must stop before the signal, and the blinking dot means the detection system has detected the approaching tram.


Stop, expect go - signal L3

This signal gives the driver a heads up that it's their tram has been detected by the traffic light controller, and they will get permission to continue soon.


Stop - signal L4

This signal means you must stop before the signal, but if you have made it so close to the signal it will be dangerous for you to stop before it, you must continue.


Go (Kør) - signal L5

This means signal means you may drive past it. There are three “Go” aspects, one meaning you may go straight, left and right depending on how the switch is set.


Route signals

FIXME

BOStrab: Weichensignale

These signals tell the tram driver which route he is continuing towards, depending on how the switch is set.

Stop - signal D0

This signal indicates there has not been set a route for the tram.


Route is set straight - signal D1

This signal indicates there has been set a route straight ahead for the tram.


Route is set to the left - signal D2

This signal indicates there has been set a route to the left for the tram.


Route is set to the right - signal D3

This signal indicates there has been set a route to the right for the tram.


Derailment point signals

Track blocked by derailer - signal Sv1

This signal indicates that the track ahead is blocked by a derailment shoe.


Track clear - signal Sv2

This signal indicates that the track ahead is not blocked by a derailment shoe.


Signs

Speed signs

Speed restriction following - sign Ha1

This sign indicates that a speed restriction is beginning soon. The signs are placed 380 meters before the restriction. The upcoming speed restriction is the number on the sign multiplied by 10, so 75 would be 75 km/h.

On the line Nørreport-Lisbjergskolen if the speed restriction is less than 20 km/h, the sign is placed where the restriction takes effect. If the restriction is higher than 20 km/h, the Ha1 sign is omitted.


Speed restriction starts now - sign Ha2

FIXME This sign indicates that a speed restriction is taking effect, beginning where the sign is placed. The speed restriction is the number on the sign multiplied by 10, so 75 would be 75 km/h.


Go faster - sign Ha3

The speed can be increased to what the sign says multiplied by 10 so 75 would be 75 km/h.

On the lines Odder-Grenaa and Lisbjerg-Lystrup the speed can be increased when the front of up to two coupled vehicles pass the sign. Other vehicles can increase their speed when they have passed the sign.

On the line Nørreport-Lisbjergskolen the speed can be increased when the front of one vehicle passes the sign. Other vehicles can increase their speed when they have passed the sign.


Speed restriction expires - sign Ha4

This sign is used to inform train drivers that the lower speed limit has ended and they are now free to increase the speed to what the line allows. It is typically placed at the end of a section where a speed restriction was in place, such as a work zone or a section of track with a temporary speed limit.


Speed restriction for vehicles without ATP - sign Ha5

This sign is only used for vehicles without ATP or vehicles where the ATP system has been disabled. This tells the driver that he must slow down to 30 km/h in case the signal is not showing a driving permission into the station written below the red speed restriction sign. Under the name of the station, there's a distance written which shows the distance to the speed restriction begins.


Platform speed - sign Ha6

These signs tell the driver what speed he is allowed to go when passing platforms. On special and shared tracé, the speed is 30 km/h and on own tracé, the speed is 45 km/h. This speed is not enforced by the ATP but is logged in the tram's onboard computer.

This sign is typically placed together with signs Dt1 or Et1


Distance until signal - sign Ha7

This sign is used along with Ha1 if the distance until the speed restriction is not 380 meters.


TBD - sign Et1

This sign has one of the two following meanings:


TBD - sign Dt1

This sign indicates to the driver that all train protection features are not active from this sign and onward. Therefore the driver can not rely on the ATP safety system to brake the train incase of speeding or driving past a H0 signal.