The U.S. Department of Transportation (DOT) has unveiled its Complementary Positioning Navigation and Timing (CPNT) Action Plan, which contains steps the department is taking to drive CPNT adoption across the United States transportation system and within other critical infrastructure areas.

DOT have selected 11 candidate technologies to demonstrate positioning or timing functions:

DOT has also released a request for information (RFI) as one of the steps in driving adoption of complementary PNT services to augment GPS.