Yes, there are crash warning systems available for connected cars. These systems use a combination of sensors, cameras, and software to monitor the vehicle's surroundings and alert the driver of potential hazards. Some systems can even automatically apply the brakes or take other evasive action to avoid a collision.

Here are some of the most common types of crash warning systems:

* Forward collision warning (FCW): This system uses a combination of sensors and cameras to monitor the traffic ahead of the vehicle. If the system detects that the vehicle is approaching another vehicle too quickly, it will alert the driver with a visual or audible warning. Some systems can also automatically apply the brakes if the driver does not take action.

* Lane departure warning (LDW): This system uses a camera to monitor the vehicle's position within its lane. If the system detects that the vehicle is drifting out of its lane, it will alert the driver with a visual or audible warning. Some systems can also automatically steer the vehicle back into its lane.

* Blind spot monitoring (BSM): This system uses radar sensors to monitor the areas around the vehicle that are not visible to the driver. If the system detects that another vehicle is in the blind spot, it will alert the driver with a visual or audible warning. Some systems can also automatically apply the brakes if the driver attempts to change lanes into a vehicle that is in the blind spot.

* Rear cross-traffic alert (RCTA): This system uses radar sensors to monitor the area behind the vehicle when it is in reverse. If the system detects that another vehicle is approaching from behind, it will alert the driver with a visual or audible warning. Some systems can also automatically apply the brakes if the driver attempts to reverse into a vehicle that is behind the vehicle.

These are just a few of the many crash warning systems that are available for connected cars. These systems can help to improve safety and reduce the risk of accidents.