ATB

ATB is the most used security system in the simulator and is used on the MG2, SG2, SG3 and RSG3 trains. The ATB is a system that always receive a signal in the cab what means there are no light signals. Except from the emplacements.

The ATB system uses the following cablights:

ATB Signal	ATB MG2/SG2 Before mid-life Revision	ATB SG2 After mid-life Revision	ATB RSG3/SG3	Maximum speed	More info
0 absoluut				0km/h	Train will be forced to a stop. This signal can be sent explicitly by the ATB system through, in which case the signal will be permanent until a better signal is received. However it is also possible that this signal appears implicitly when the continuous track signal is no longer received while the previous signal was 10 absoluut/Absolute 10. In that case resetting the train will result in the 0 permissief/Permissive 0 signal being received instead.
10 absoluut				8km/h	Maximum speed 8km/h, the buzzer will sound every 7 seconds. This signal is received when nearing the end of the track or nearing a switch that is not properly set and locked for this train. Passing a 'S' signpost with this signal being displayed will result in a 0 absoluut signal that will force the train to a stop.
Geel 10 10 permissief				10km/h	Maximum speed 10km/h, the buzzer will sound every 7 seconds. Danger, appears when no signal is received, for example when driving in the wrong direction or when the current block is full.
Geel 20 20 permissief				20km/h	Maximum speed 20km/h, the buzzer will sound every 7 seconds. Appears when nearing a block that is filled by another train or when nearing a junction that isn't set.
Groen 35				35km/h	Maximum speed 35km/h, this is used at small junctions.
Groen 50				50km/h	Maximum speed 50km/h
Groen 60				60km/h	Maximum speed 60km/h, only available on the SG3 and RSG3, otherwise it will shown as Groen 50.
Groen 70				70km/h	Maximum speed 70km/h
Groen 80				80km/h	Maximum speed 80km/h
Groen 100				100km/h	Maximum speed 100km/h (Coming with the 2020 ATB upgrade)
Vertrekverbod				50km/h	Maximum speed 50km/h, the buzzer will sound every 7 seconds. It is not permitted to depart from the station. This signal is used when the train is ahead of schedule.

Speed restrictions in ATB-Blocks

Every block contains its own speed restriction. Normally at the RET subway system in the Tunnel section Groen 70 is normally used except on particular blocks there is Groen 80 allowed. These groen 80 blocks are to be found between "Leuvehaven" and "Wilhelminaplein" at the D and E line and between "Voorschotenlaan" and "Kralingse Zoom" at the A, B,and C Line.

At the crossing at the President Rooseveldweg in the East of Rotterdam there is also an ATB Exception. Departing the station of "Graskruid" in the direction of Ommoord/Nesselande there is an ATB exception which give the Red STOP sign together with yellow 50. This is the only exception which tells the driver to use the "Permissive" Button in orde to cross the Level-Crossing with caution. When the Level-Crossing is out of order the situation is to give way to the other traffic at the Road. Coming from Ommoord/Nesselande you will have the same ATB Cab-signalling when crossing this Level-Crossing.

In MetroSimulator it is not simulated while there is no level-Crossing included in comparing with this crossing.

Follow-Up Block Signs.

Common block signals are:

From the mainline into a station diverting to an other track:

(Groen 80 >) Groen 70 > Groen 50 > Groen 35 > Geel 20 and/or Geel 10 (10 Absolute)

From the mainline diverting to the mainline track in opposite direction (Left-Hand Traffic):

Groen 70 > Groen 50 > Groen 35 > Point > Axle free > groen 70* (*depending the regular speed limitation)

At the next point if diverting back to the original track you will receive common ATB cab signalling as notified.

Departing a station and diverting to an other track:

Groen 35 until all points are free of all train axles then Assigned block speed.

S Posts and ATB signals:

To cover a track switch/crossover, S Posts are used. The S Posts are placed before a switch/crossover and will secure the points behind the S Post. The S post means Stop before the S Post when 10 Absolute is being shown in the ATB Cab signal.

In order to approach an point two S Posts are placed prior to the track switch/crossover. The distance is a full length of a train between the S Posts.

Do NOT Pass the S posts with the ATB display of 10 Absolute! You can only move forward in the restricted speed of max. 8 km/h until the S-Posts. Passing the S Posts will activate the ATB brake as an emergency brake and you will be stopped roughly at once.

In this situation you have a Signal Passed at Danger (SPAD) offence.

How to handle:

Prohibition of Departure:

Yellow 50 and a blue arrow is lit at the ATB cab display: You will receive this signal when arriving too early according to the timetable at a specific station.

The CVL is allowed to give a PoD if necessary in extension of the time schedule or other related issues causing a delay or prior to maintenance works.

You are not allowed to depart the station. Upon stopping, ignore the deadman buzzer and open all of the doors on the platform side. (only unlock the doors, in the case of cold and rainy weather) Wait until the signal changes to a green signal on the ATB display.

Close doors and depart smoothly.

Yellow signalling.

To pass a yellow block use the permissive button in order to confirm the deadman and to prevent the ATB brake from activating. Use the "Tilde" (~) or "ù" (AZERTY) button to confirm the deadman. This is only required when a buzzer is heard and a yellow speed limit is displayed. Do not pass the red arrow on the speed gauge.

Security Systems
ATB · ZUB