CMS crossing (railroad) transp.

[Badmal]

Пожалуйста, помогите перевести.

Выражение встречается в следующем контексте: перечень продукции предприятия ж/д индустрии.

Заранее спасибо

[alk]

http://www.calccit.org/itsdecision/serv_and_tech/Safety/Highway_rail/highway_rail_report.html
Second Train Coming (STC)
A second train coming system uses railway sensors and a Changeable Message Sign (CMS—also referred to as Variable Message Signs) to warn drivers of the presence of a second train which is approaching the crossing soon after an initial train has cleared the crossing. After the crossing gates have been lowered, sensors in the track detect a second train coming and then activate the CMS. The CMS usually displays a STC warning such as "Danger: Second Train Approaching." The most common types of CMS use fiber optics, light-emitting diodes (LED), reflective disks, or a combination of these technologies.