With respect to the physical condition of the U.S. Transportation System:

• The condition of the U.S. transportation infrastructure is improving, but additional work is needed. The percentage of structurally deficient bridges declined from 12.3 percent in 2007 to 11 percent in 2012.
• One impact of bridge deterioration is reduced load limits. In 2013, 11.8 percent of all bridges had reduced load limits, which caused commercial vehicle operators to use smaller trucks or take circuitous routes, increasing the costs of their operations.
• Airport runways are in good condition; only 2 percent are considered poor.
• The average age of inland waterway navigation locks is more than 50 years. The oldest locks tend to have longer tow delays and more frequent service outages than newer locks.

FIGURE 2 Bridge Condition by Age Group: 2011

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