Rural vs Urban Bridge Conditions

America's 624,191 bridges serve vastly different communities. Some carry 200,000 vehicles per day through dense urban corridors. Others see fewer than 100 vehicles daily on remote county roads. The condition of these bridges -- and the resources available to maintain them -- varies dramatically based on where they are located.

We categorized all NBI bridges by average daily traffic (ADT) as a proxy for rural vs. urban classification: bridges with ADT under 1,000 as rural, 1,000-10,000 as suburban, and over 10,000 as urban. Here is what the data shows.

Rural bridges (ADT < 1,000): 314,912 bridges (50.5% of total). Poor condition rate: 9.2%. Average age: 47 years.

Suburban bridges (ADT 1,000-10,000): 191,706 bridges (30.7% of total). Poor condition rate: 4.6%. Average age: 50 years.

Urban bridges (ADT > 10,000): 117,573 bridges (18.8% of total). Poor condition rate: 3.4%. Average age: 48 years.

Rural bridges make up the majority of the national inventory, but they face unique challenges. Many are owned by local counties or townships with limited engineering staff and maintenance budgets. Because they carry low traffic volumes, they generate less political urgency for repairs -- even though rural communities may depend on them as the only route to schools, hospitals, or markets.

Urban bridges, by contrast, tend to receive more attention (and funding) because of their visibility and traffic impact. However, they endure far more wear and tear from heavy truck traffic and are more expensive to repair because of the complexity of working in congested urban environments.

Federal bridge funding formulas generally prioritize bridges based on condition and traffic volume, which tends to favor urban bridges. The Bipartisan Infrastructure Law includes provisions for off-system bridges (those not on the federal-aid highway system), which are disproportionately rural. This is a significant policy shift, as these bridges have historically been the most neglected.

To see how your state's bridges break down by condition, visit the [state report cards](/reports). For the national picture, explore our [state rankings](/blog/best-bridge-infrastructure-by-state-2025) or the [most-traveled bridges](/blog/most-traveled-bridges-america) list.