There’s a problem with the improvements in fuel economy pushed by President Obama. According to Ray LaHood, his former secretary of transportation, it means shrinking gas taxes and that’s killing hopes to fix the nation’s roads and bridges.

Shushed by the president when he first suggested new taxes, including a fee for every mile traveled, the recently retired LaHood is calling on the administration to consider a 10-cent tax and other ways to raise money to fix roads.