[jessaustin]

If you have Progressive Snapshot or a similar device, that's storing driving data, but which cars do so by themselves?

[bri3d]

Almost all modern cars have an Event Data Recorder as part of the SRS/Airbag system which records snapshot data in the event of a deployment. Here are some NHTSA standards for EDR storage:

http://www.nhtsa.gov/DOT/NHTSA/Rulemaking/Rules/Associated%2...

Here's a list of vehicles supported by one consultant's forensics software:

http://www.rimkus.com/uploads/pdfs/Event_Data_Recorder.pdf