Abstract: Vehicle, provided with: —at least an optical passage (1) situated at a vehicle exterior for passing on optical signals (S1, S2); —at least an elongate optical signal guide (2), extending between said passage (1) and at least an optical signal processing unit (U) situated in the vehicle. The invention further provides a system for transmitting and receiving optical signals, as well as methods.

Abstract: An emergency service warning system, arranged to warn a user of approach of emergency services, provided with: at least one movable emergency service transmitter (T) and at least one stationary base station (M), which emergency service transmitter (T) and base station (M) are arranged to communicate utilizing uplink signals (S) and respective downlink signals (d); at least one user receiver (R) which is arranged to detect uplink signals (S) transmitted by the emergency service transmitter (T) and to deliver a warning signal upon detection of an uplink signal (S); wherein the user receiver (R) is arranged to search for uplink signals utilizing information concerning the at least one base station.

Abstract: An emergency service warning system is described herein that is arranged to warn a user of approach of emergency services. The system includes movable emergency service transmitters (T) and at least one receiver (M, R), arranged to receive signals transmitted by the emergency service transmitters (T). The system is provided with at least one stationary emergency service communication device (M) for the purpose of communication with the emergency service transmitter (T) utilizing emergency service signals. The system includes at least one user receiver (R) which is arranged to detect emergency service signals and to deliver a warning signal upon detection of an emergency service signal.

Abstract: An emergency service warning system is described herein that is arranged to warn a user of approach of emergency services. The system includes movable emergency service transmitters (T) and at least one receiver (M, R), arranged to receive signals transmitted by the emergency service transmitters (T). The system is provided with at least one stationary emergency service communication device (M) for the purpose of communication with the emergency service transmitter (T) utilizing emergency service signals. The system includes at least one user receiver (R) which is arranged to detect emergency service signals and to deliver a warning signal upon detection of an emergency service signal.