| 摘要 |
The invention relates to a holographic signalling device. This device comprises at least one traffic lane along a main axis between side walls and under an upper wall, this device comprising an indicator panel consisting of a holographic plate illuminated by an appropriate light source, characterised in that this plate is arranged in proximity to one of the said walls and extends parallel to the main traffic axis. The invention applies to vehicular traffic in an underground working, especially a road or rail traffic tunnel, or a car park. <IMAGE>
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