# Commission Decision of 30 May 2002 concerning the technical specification for interoperability relating to the rolling stock subsystem of the trans-European high-speed rail system referred to in Article 6(1) of Directive 96/48/EC (notified under document number C(2002) 1952) (Text with EEA relevance) (2002/735/EC), Division 4.2.11: Hot-box detection

Extent: E+W+S+N.I.

Axle box temperature rise shall be detected on high-speed trains.
This monitoring equipment shall be able to detect a temperature rise over time to allow abnormal temperature rises in an axle box to be detected. It shall be able to reliably transmit warning and alarm messages that, if necessary, are graduated in order to initiate a speed reduction or a train-stop depending on the extent of the temperature rise.
To prevent confusion when a hot box warning is given, the hotbox detection system has to be located entirely on board.
In addition, it has to be taken into account that axle box temperature-monitoring equipment is nevertheless installed on the ground to monitor trains not yet equipped with such train-borne systems or other types of trains running on the line.
Train-borne equipment shall not interfere with trackside axle box temperature-monitoring equipment installed on the routes concerned.
Infrastructure managers shall ensure the compatibility between the operation of interoperable trainsets and trackside axle box temperature monitoring equipment, according to the conditions set out in Section 7.2.6.2 of infrastructure TSI.

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Source: https://www.legislation.gov.uk/eudn/2002/735/annex/division/4/division/4.2/division/4.2.11 (the official version)
Page: https://openlegislation.uk/eu-decision-2002-735/annex/division-4/division-4.2/division-4.2.11
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.