| 摘要 |
A system, method and device for communicating information from a wayside device to a vehicle are provided. In one embodiment, the device comprises. a first light unit configured to emit a first pattern of light in a non-visible spectrum; a second light unit configured to emit a second pattern of light in the non-visible spectrum; wherein said first pattern is distinct from said second pattern; an interface in communication with the first and second light units and configured to receive information of an operational mode of the wayside device; wherein the first and second light units are responsive to one or more first control signals from said interface to operate in a first mode, corresponding to a first operational mode of the wayside device, in which said first pattern of light is on and said second pattern of light is off; and wherein the first and second light units are responsive to one or more second control signals from said interface to operate in a second mode, corresponding to a second operational mode of the wayside device, in which said first pattern of light is off and said second pattern of light is on. |
