If you and/or someone you know use iOS, someone made a very handy Shortcut task to automatically record, notify a contact, and upload a video if you get pulled over. I just discovered Shortcuts on my iPhone, and seems like a very powerful way to program tasks.

https://www.khou.com/mobile/article/news/hey-siri-im-getting-pulled-over-new-shortcuts-app-allows-users-to-quickly-record-police/83-600653116