The Texas Transportation Department is providing truckers with free, in-cab traffic alerts by drawing from real-time traffic data.

California's transportation department says its agreement with the transportation data and software firm Inrix marks a first in state history.

A recent study by the transportation data company Inrix concludes that suboptimal traffic-signal timing is responsible for at least 10% of total traffic delay time.

Louisiana, Oregon, Rhode Island, Tennessee and Texas have boosted their use of real-time roadway data in recent months.

Rules of the road have been put into a digital format and served up to highly autonomous vehicles operating in the region.