10:46 AM EDT, 03/23/2026 (MT Newswires) -- General Motors ( GM ) said Monday it has started supervised public-road testing of its automated technology on limited access highways in California and Michigan.

The firm said it will soon deploy over 200 manual and supervised development vehicles in live traffic environments, moving to active automated technology testing from manual data collection.

Shares were up about 5% amid a broadly higher market.

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