Michigan is set to become the fourth state to allow self-driving vehicle testing once a new legislation is officially signed.

The legislation was approved this week by state lawmakers, according to Edmunds.

Once Governor Rick Snyder signs the legislation, all manufactures and third-party companies will be allowed to test autonomous vehicles on public roads.

Snyder is expected to sign the legislation without hesitation as he has been a vocal advocate of autonomous vehicles for a while now.

In his 2013 State of the State address, the Governor said he had intentions to work with the legislature towards "establishing Michigan as a leader in autonomous vehicle testing to attract jobs stemming from this emerging industry," according to Edmunds.

The legislation does mention that a human operator be present during testing to "monitor performance and intervene if necessary."

 It also reads that self-driving vehicles will be required to have a "Manufacturing" license plate, according to Edmunds.

Many automakers have been actively involved in testing self-driving vehicles, like: Audi, BMW, GM, Mercedes-Benz, Nissan, Tesla and Volvo.

Google made headlines last year when it posted a video of a blind man using a self-driving Toyota Prius to travel around town. The video went viral and has been seen over 5 million times.

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