Recession Slows Down Big Rigs There are fewer big trucks on the road this summer, and they're carrying a lot less. Freight shipping is off 20 percent. Big, heavy items like building materials are down much more, and food shipping also has taken a hit. The slump has left drivers waiting long days for loads, driving long distances with empty trucks to get them and earning less per mile when they do find work. Frank Morris reports for member station KCUR.