Trakhak

You've got that backwards. The recommendation by the AAA to refer to car accidents as car crashes is a very recent development and can be seen as ironic, given the historical background.

From this page:

Using the word "accident" to describe car crashes might seem natural. But early coverage of crashes in the 1910s and 1920s depicted the vehicles as dangerous killing machines — and their violent collisions were seldom called accidents.

In response to the emerging public backlash against cars (which were, at the time, largely owned and driven by the wealthy), automakers and other industry groups pushed for a new set of laws that kept pedestrians off the streets, except at crosswalks.

This view influenced legal proceedings, too. Before formal traffic laws existed, judges typically ruled that in any collision, the larger vehicle — that is, the car — was to blame. In most pedestrian deaths, drivers were charged with manslaughter regardless of the circumstances of the crash.

To get people to follow these laws, they tried to shape news coverage of crashes. The National Automobile Chamber of Commerce, an industry group, established a free wire service for newspapers: Reporters could send in the basic details of a traffic collision, and would get in return a complete article to print the next day. These articles, printed widely, shifted the blame for crashes to pedestrians — and almost always used the word "accident."