GM to begin testing autonomous cars on Michigan public roads

Markets Associated Press

  • General Motors Chairman and Chief Executive Officer Mary Barra stands next to an autonomous Chevrolet Bolt electric car Thursday, Dec. 15, 2016, in Detroit. General Motors has started testing fully autonomous vehicles on public roads around its technical center in suburban Detroit. (AP Photo/Paul Sancya)

    General Motors Chairman and Chief Executive Officer Mary Barra stands next to an autonomous Chevrolet Bolt electric car Thursday, Dec. 15, 2016, in Detroit. General Motors has started testing fully autonomous vehicles on public roads around its ... technical center in suburban Detroit. (AP Photo/Paul Sancya) (The Associated Press)

  • General Motors Chairman and Chief Executive Officer Mary Barra speaks Thursday, Dec. 15, 2016, in Detroit. General Motors has started testing fully autonomous Chevrolet Bolt electric vehicles on public roads around its technical center in suburban Detroit. (AP Photo/Paul Sancya)

    General Motors Chairman and Chief Executive Officer Mary Barra speaks Thursday, Dec. 15, 2016, in Detroit. General Motors has started testing fully autonomous Chevrolet Bolt electric vehicles on public roads around its technical center in suburban ... Detroit. (AP Photo/Paul Sancya) (The Associated Press)

  • General Motors Chairman and Chief Executive Officer Mary Barra speaks next to a autonomous Chevrolet Bolt electric car Thursday, Dec. 15, 2016, in Detroit. General Motors has started testing fully autonomous vehicles on public roads around its technical center in suburban Detroit. (AP Photo/Paul Sancya)

    General Motors Chairman and Chief Executive Officer Mary Barra speaks next to a autonomous Chevrolet Bolt electric car Thursday, Dec. 15, 2016, in Detroit. General Motors has started testing fully autonomous vehicles on public roads around its ... technical center in suburban Detroit. (AP Photo/Paul Sancya) (The Associated Press)

General Motors plans to begin immediately testing autonomous cars on public roads in Michigan.

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The announcement comes one week after Gov. Rick Snyder signed legislation that allows the cars to be tested on public roads without a driver or a steering wheel. The automaker says that for now it will have a human driver as a backup in the Chevrolet Bolts it will use for the tests.

GM said Thursday that the cars will initially be driven on the roads around its Technical Center in Warren, Michigan. The rides will eventually expand to metro Detroit.

Testing in Michigan will allow companies to try out autonomous vehicles in snowy weather, which can present a challenge for the cameras and sensors the cars use to navigate.