If you’ve hit a pothole hard enough to rattle your teeth lately, you’re not imagining things. American roads are in rough shape – roughly 40% of our 4 million miles are rated poor or mediocre. The catch is that fixing them is getting harder, not easier. The U.S. construction sector is projected to need close to 700,000 more workers by 2031, and more than 20% of the crews out there today are already over 55 years old. So the real question isn’t whether we need to rebuild our roads.