System for signalling a level of risk of presence of a road disturbance in a determined area of presence of a vehicle, of the type comprising: - an embedded device in a vehicle (v) comprising: means for locating the vehicle, notably of GPS type, signalling means (23a, 23b) suitable for enabling the user associated with the vehicle (v) to send to the server, via remote communication means, the location coordinates (L, 1) of a disturbance encountered, management means, notably of processor type, - a remote server comprising: means suitable for ensuring the location of a disturbance signalled by the embedded device from the information communicated thereby, management means, notably of processor type, the embedded device and the remote server comprising two-way remote communication means (21, 20), characterized in that: - the embedded device comprises means (25a, 25b) for interrogating the user associated with the vehicle (v) as to the presence of a disturbance, - the embedded device comprises response means (23a, 23b) suitable for allowing the user to respond to this interrogation, - the embedded device comprises means suitable for communicating to the remote server the content of the response, or the non-response from the user, - the remote server comprises means (13, 14) for analyzing this response or this non-response suitable for generating an index of reliability of the user associated with the vehicle (v), - the embedded device comprises means suitable for communicating to the user of the vehicle, notably in visual and/or sound form, an information item relating to an index of reliability parameter of the user or users who have passed "over" this disturbance within a given period (t). - an embedded device in a vehicle (v) comprising: means for locating the vehicle, notably of GPS type, signalling means (23a, 23b) suitable for enabling the user associated with the vehicle (v) to send to the server, via remote communication means, the location coordinates (L, 1) of a disturbance encountered, management means, notably of processor type, means for locating the vehicle, notably of GPS type, signalling means (23a, 23b) suitable for enabling the user associated with the vehicle (v) to send to the server, via remote communication means, the location coordinates (L, 1) of a disturbance encountered, management means, notably of processor type, - a remote server comprising: means suitable for ensuring the location of a disturbance signalled by the embedded device from the information communicated thereby, management means, notably of processor type, the embedded device and the remote server comprising two-way remote communication means (21, 20), means suitable for ensuring the location of a disturbance signalled by the embedded device from the information communicated thereby, management means, notably of processor type, the embedded device and the remote server comprising two-way remote communication means (21, 20), - the embedded device comprises means (25a, 25b) for interrogating the user associated with the vehicle (v) as to the presence of a disturbance, - the embedded device comprises response means (23a, 23b) suitable for allowing the user to respond to this interrogation, - the embedded device comprises means suitable for communicating to the remote server the content of the response, or the non-response from the user, - the remote server comprises means (13, 14) for analyzing this response or this non-response suitable for generating an index of reliability of the user associated with the vehicle (v), - the embedded device comprises means suitable for communicating to the user of the vehicle, notably in visual and/or sound form, an information item relating to an index of reliability parameter of the user or users who have passed "over" this disturbance within a given period (t).