Technologies are shown for intervehicle communication involving notification messages sent from one vehicle to another vehicle. Sensor event data from one vehicle can be sent in a wireless message to another vehicle and information from the wireless message displayed to a driver of the other vehicle providing the driver with information that may not be detectable by the sensors in the driver's vehicle. Inquiries or requests can also be sent from one vehicle to another vehicle. User interfaces can include graphical user interfaces, haptic devices and audio devices.