Call barrier
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A call barrier secures a level crossing that is rarely used by road users , which is usually off the beaten track and often cannot be seen by the barrier attendant responsible . The barrier booms are generally closed and are only opened if necessary - if this is possible without risk (see § 11 (17) EBO )
If a road user wants to pass such a level crossing, he or she reports to the gatekeeper on duty via an intercom . After consulting the dispatchers who are responsible for the track section to the left or right of the crossing, the latter then opens the barrier if the train traffic allows it or announces the opening via the intercom. Since he crosses the level i. d. Usually can not see, the user is asked to report the evacuation to the guard. In exceptional cases, the guard may listen to the noises at the level crossing via the intercom and then close the barriers again. Before he closes the barriers, he announces the closing over the intercom. One or more cameras are rarely installed to ensure more security.
Level crossings over which herd cattle have to be driven can be designed differently. Here a sliding barrier is pushed over the track so that the cattle do not break out over the track.
In the long term, for reasons of economy, call barriers should no longer be approved; they should be gradually secured by secured level crossings by means of barrier monitoring or a hazard area clearing system and backwater detection .
Intercom at a call barrier
Intercom at a crossing for cattle drive
Intercom in the signal box
Procedure at a call barrier
literature
- Handheld dictionary of electrical telecommunications ; 2nd edition, Volume 1, 1970; P. 44
