Road transportation underpins economic activity and everyday life. The National Academies explore traffic safety, infrastructure design, and technology to make roads safer and more resilient. The 2026 ...

Gas tax revenues are dwindling as cars become more fuel efficient and more drivers switch to electric vehicles. That revenue has been the primary source of state transportation funding for decades.

Surely, we’ll have flying cars by 2050. But on the off-chance that we don’t — and probably even if we do — we’ll need guidance for the next 20 to 25 years as the state, counties, cities and tribal ...