A recently passed bill will require all cars to come equipped with “black boxes” that record vehicle data. These Event Data Recorders (EDR), similar to their airplane counterparts, will record data such as speed, brake force and electrical systems monitoring. The days of a car crash being one driver’s word against another look to be history.

Senate Bill 1813 (known as Map-21) mandates that automakers install EDRs in all new vehicles starting in 2015. The bill was recently passed and is expected to be approved by the House.

The National Highway Transportation and Safety Administration has been studying and mulling over EDRs in vehicles for several years, but has stopped short of requiring manufacturers to implement them, CNET reports. However, many auto manufacturers already use these devices to help engineers and mechanics perform diagnostics tests and identify malfunctioning parts.

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