Tesla Inc. gained approval from the Arizona Department of Transportation to start testing its autonomous vehicles with safety ...

The Arizona Department of Transportation is inviting Arizonans to put their creativity skills to the test by participating in its annual Safety Message Contest.

The approval by ADOT comes after Tesla applied with state regulators to operate self-driving vehicles with or without safety drivers.

PHOENIX — The Arizona Department of Transportation will begin testing some new high-tech paving equipment that the department said will help save money down the road. ADOT is outfitting a pavement ...