Abstract: Device, system and method, in a vehicle communication system, of securely storing safety-related messages. Embodiments include both digital signing and digital encryption such that (i) stored message validity is assured; and (ii) only qualified or pre-selected recipients are able to decrypt the message. Embodiments include storing environmental information geographically related to a safety event. Embodiments include a plurality of vehicles within wireless communication range receiving a network warning message and then securely storing related information in response to the warning message. Embodiments include measuring time-of-transit of messages and using this measured time to triangulate position of a transmit source. This information may be transmitted or stored. Embodiments include forwarding of network warning messages. Algorithms are described to identify spoofed messages.

Abstract: Device, system and method, in a vehicle communication system, of generating lane maps. Embodiments use a plurality of location points to build up a lane, then record that lane in memory. Location points may be locations over which a first vehicle generating the lane map passes, or may be location points broadcast by a second vehicle to the first vehicle. Methods are described to wirelessly share lane information and lane maps between vehicles. Embodiments use a “confidence value” describing the confidence that the lane parameters are valid. Algorithms are described for creating and updating the confidence values. Methods of compressing and storing lane information and lane maps are described. Embodiments include geographic height in lane information.

Abstract: Device, system and method, in a vehicle communication system, of transmitting a risk value in a message, wherein the risk value identifies quantitatively a risk of vehicle collision. Embodiments determine risk value by combining sub-risk values wherein sub-risks comprise: (i) vehicle behavior; (ii) weather and road conditions; (iii) current traffic; and (iv) location history. Embodiments include driver warnings responsive to the risk value in a received message. Embodiments include a collision type in a message. Embodiments include unique features of: risk is applicable to receiving vehicles; risk is applicable to a geographical region; computation and storage of location histories; messages free of IP and MAC addresses; haptic devices used for driver warning.