When you are driving on public roads you can be faced with all sorts of different hazards. If a driver is aware of hazards beforehand, they are able to be better prepared for what is ahead. Apple is aware of this, that is why they have added a new feature to 'Maps' on iOS 14.5 or later. Now when using 'Maps' you are able to report accidents, hazards, and speed checks while you are using 'Maps' for directions. You can access this feature hands-free using 'CarPlay', while you are driving paying attention to the road.
MacRumors has more detail and information on how to use the new feature in 'Maps' here.