General Motors unveiled a fleet of 130 Chevrolet Bolt EV test vehicles equipped with self-driving technology that it plans to "deploy at scale," the company has announced.

GM has already been testing more than 50 self-driving Bolt EVs in San Francisco, Detroit, and Scottsdale, Ariz. The fleet should eventually grow to 180 vehicles, according to GM.

"This production milestone brings us one step closer to making our vision of personal mobility a reality," said Mary Barra, GM's chairman and CEO. "Expansion of our real-world test fleet will help ensure that our self-driving vehicles meet the same strict standards for safety and quality that we build into all of our vehicles."

GM began building self-driving Bolt EVs in January at its Orion Assembly Plant in Orion Township, Mich. GM has been developing the vehicles via Cruise Automation, a San Francisco-based research facility seeking to accelerate the development of self-driving vehicles.

"To achieve what we want from self-driving cars, we must deploy them at scale," said Kyle Vogt, Cruise Automation's CEO. "By developing the next-generation self-driving platform in San Francisco and manufacturing these cars in Michigan, we are creating the safest and most consistent conditions to bring our cars to the most challenging urban roads that we can find."