System and method to leave a message or communicate with someone outside of a vehicle

A computer-implemented method when executed on data processing hardware causes the data processing hardware to perform operations comprising:

• receiving user data measured by a health monitoring system of a vehicle;
• detecting, based on the user data, that a user of the vehicle is experiencing a medical emergency;
• generating a message for display via a window of the vehicle, the message communicating the medical emergency to external users outside of the vehicle;
• and
• displaying, via the window of the vehicle, the message to the external users outside of the vehicle.

A system comprising:

• data processing hardware;
• and
• memory hardware in communication with the data processing hardware, the memory hardware storing instructions that when executed on the data processing hardware cause the data processing hardware to perform operations comprising:
• detecting that a status of a vehicle indicates that the vehicle is parked;
• receiving context data of a user of the vehicle;
• generating a message for display via a window of the vehicle, the message directed to external users outside of the vehicle;
• transmitting, to a user device in communication with the data processing hardware, the message for display on the user device, wherein the user device is remote from the vehicle;
• receiving a user indication indicating approval of the message for display via the window of the vehicle;
• receiving a user-defined message from the user via the user device;
• re-formatting the user-defined message for display via the window of the vehicle;
• and
• displaying, via the window of the vehicle, the re-formatted user-defined message to the external users outside of the vehicle.