IOS 14.5 beta, available to developers and public beta testers, adds a new Apple Maps feature that lets you report crashes, hazards, and speed checks along the route when you get directions.
When you enter an address, select a route, then choose “Go”, Siri notifies you that you can report accidents or dangers you see along the way.
If you swipe up on the Apple Maps interface where map details are available, you can tap the “Report” button that allows you to signal an accident, danger, or speed check, similar to other mapping applications such as Waze. If you tap, it automatically flags your location without a confirmation window, so it should only be used in valid situations.
You can also say “Hey Siri, there’s an accident” and Siri will send a report to “Apple Maps” and probably if there are enough people reporting, an accident site will appear in the crowdsourcing maps app. This is currently available in the United States at a testing capacity and it is not yet clear if it occurs in other countries.
This also works in CarPlay, as mentioned on MacRumors MozMan68 forums, with the reporting interface available on the arCarPlay screen.
Note that Siri will inform you about the new crash reporting feature the first time you look for directions after upgrading to iOS 14.5, but the feature is not mentioned after that. There is no similar crash reporting functionality available in iOS 14.4 and it also does not appear to appear for all iOS 14.5 users at this time based on Reddit reports, so it is probably a secondary server element.