Bridge Infrastructure Insights
Data journalism powered by the National Bridge Inventory. Rankings, analysis, and deep dives into the state of America's 600,000+ bridges.
Rural vs Urban Bridge Conditions
Do rural bridges fare better or worse than urban ones? We analyze condition data across traffic volume categories to reveal the infrastructure divide.
States Facing the Greatest Bridge Repair Needs
Which states have the most bridges in poor condition? We rank every state by the scale of its bridge repair challenge, from total poor bridges to poor-condition percentage.
Bridges Built Before 1920 Still in Use Today
Hundreds of bridges built before 1920 remain in active service across the United States. Here is where they are, what condition they are in, and why they have lasted so long.
The Most Common Bridge Types in America
What kinds of bridges make up America's infrastructure? We break down the NBI data by structure type, from concrete slabs to steel trusses.
Texas Bridge Infrastructure: A Comprehensive Analysis
An in-depth look at Texas's vast bridge inventory -- the largest in the nation -- including condition grades, highest-traffic crossings, and oldest structures.
California Bridge Safety Report 2025
California's bridges carry some of the heaviest traffic loads in the nation. Here is the latest data on condition ratings, safety concerns, and infrastructure investment.
Illinois Bridge Conditions: A Deep Dive
Illinois has one of the oldest bridge inventories in the country. We analyze current conditions, worst-rated structures, and trends across all 102 counties.
Ohio Bridge Infrastructure Report
Ohio's extensive highway network includes thousands of aging bridges. This analysis covers condition grades, critical structures, and repair priorities.
Pennsylvania Bridge Safety: Thousands of Bridges Examined
Pennsylvania has more structurally deficient bridges than almost any other state. Here is the data behind the headlines.
Alabama Bridge Infrastructure: A Complete Analysis
A comprehensive look at Alabama's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Alaska Bridge Infrastructure: A Complete Analysis
A comprehensive look at Alaska's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Arizona Bridge Infrastructure: A Complete Analysis
A comprehensive look at Arizona's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Arkansas Bridge Infrastructure: A Complete Analysis
A comprehensive look at Arkansas's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Colorado Bridge Infrastructure: A Complete Analysis
A comprehensive look at Colorado's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Connecticut Bridge Infrastructure: A Complete Analysis
A comprehensive look at Connecticut's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Delaware Bridge Infrastructure: A Complete Analysis
A comprehensive look at Delaware's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
District of Columbia Bridge Infrastructure: A Complete Analysis
A comprehensive look at the District of Columbia's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Florida Bridge Infrastructure: A Complete Analysis
A comprehensive look at Florida's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Georgia Bridge Infrastructure: A Complete Analysis
A comprehensive look at Georgia's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Hawaii Bridge Infrastructure: A Complete Analysis
A comprehensive look at Hawaii's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Idaho Bridge Infrastructure: A Complete Analysis
A comprehensive look at Idaho's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Indiana Bridge Infrastructure: A Complete Analysis
A comprehensive look at Indiana's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Iowa Bridge Infrastructure: A Complete Analysis
A comprehensive look at Iowa's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Kansas Bridge Infrastructure: A Complete Analysis
A comprehensive look at Kansas's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Kentucky Bridge Infrastructure: A Complete Analysis
A comprehensive look at Kentucky's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Louisiana Bridge Infrastructure: A Complete Analysis
A comprehensive look at Louisiana's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Maine Bridge Infrastructure: A Complete Analysis
A comprehensive look at Maine's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Maryland Bridge Infrastructure: A Complete Analysis
A comprehensive look at Maryland's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Massachusetts Bridge Infrastructure: A Complete Analysis
A comprehensive look at Massachusetts's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Michigan Bridge Infrastructure: A Complete Analysis
A comprehensive look at Michigan's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Minnesota Bridge Infrastructure: A Complete Analysis
A comprehensive look at Minnesota's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Mississippi Bridge Infrastructure: A Complete Analysis
A comprehensive look at Mississippi's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Missouri Bridge Infrastructure: A Complete Analysis
A comprehensive look at Missouri's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Montana Bridge Infrastructure: A Complete Analysis
A comprehensive look at Montana's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Nebraska Bridge Infrastructure: A Complete Analysis
A comprehensive look at Nebraska's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Nevada Bridge Infrastructure: A Complete Analysis
A comprehensive look at Nevada's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
New Hampshire Bridge Infrastructure: A Complete Analysis
A comprehensive look at New Hampshire's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
New Jersey Bridge Infrastructure: A Complete Analysis
A comprehensive look at New Jersey's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
New Mexico Bridge Infrastructure: A Complete Analysis
A comprehensive look at New Mexico's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
New York Bridge Infrastructure: A Complete Analysis
A comprehensive look at New York's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
North Carolina Bridge Infrastructure: A Complete Analysis
A comprehensive look at North Carolina's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
North Dakota Bridge Infrastructure: A Complete Analysis
A comprehensive look at North Dakota's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Oklahoma Bridge Infrastructure: A Complete Analysis
A comprehensive look at Oklahoma's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Oregon Bridge Infrastructure: A Complete Analysis
A comprehensive look at Oregon's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Rhode Island Bridge Infrastructure: A Complete Analysis
A comprehensive look at Rhode Island's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
South Carolina Bridge Infrastructure: A Complete Analysis
A comprehensive look at South Carolina's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
South Dakota Bridge Infrastructure: A Complete Analysis
A comprehensive look at South Dakota's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Tennessee Bridge Infrastructure: A Complete Analysis
A comprehensive look at Tennessee's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Utah Bridge Infrastructure: A Complete Analysis
A comprehensive look at Utah's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Vermont Bridge Infrastructure: A Complete Analysis
A comprehensive look at Vermont's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Virginia Bridge Infrastructure: A Complete Analysis
A comprehensive look at Virginia's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Washington Bridge Infrastructure: A Complete Analysis
A comprehensive look at Washington's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
West Virginia Bridge Infrastructure: A Complete Analysis
A comprehensive look at West Virginia's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Wisconsin Bridge Infrastructure: A Complete Analysis
A comprehensive look at Wisconsin's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
Wyoming Bridge Infrastructure: A Complete Analysis
A comprehensive look at Wyoming's bridge inventory, including condition grades, highest-traffic crossings, worst-rated structures, and oldest bridges.
The Most Traveled Bridges in America
Which bridges carry the most traffic? We rank the top 50 bridges by average daily traffic, from six-figure-ADT urban interchanges to iconic crossings.
Oldest Bridges Still Standing in the United States
From colonial-era stone arches to pre-Civil War covered bridges, these are America's oldest surviving bridges still in the NBI inventory.
Understanding Bridge Condition Ratings: A Complete Guide
Everything you need to know about how the FHWA rates bridges -- the 0-9 scale, Good/Fair/Poor classifications, sufficiency ratings, and what they all mean.
High Hazard Dams in America: What You Need to Know
Thousands of U.S. dams are classified as 'high hazard,' meaning failure would likely cause loss of life. Here is the data on where they are and what condition they are in.
Bridge vs Dam: Understanding America's Infrastructure
How do America's bridge and dam inventories compare? We look at the data, the risks, and the investment patterns for both types of critical infrastructure.
How Bridges Are Inspected: The NBI Process
A detailed look at the federal bridge inspection process -- who inspects, how often, what they look for, and how the data ends up in the National Bridge Inventory.
The 50 Worst-Rated Bridges in America (2025 Data)
A data-driven look at the 50 bridges with the lowest sufficiency ratings in the United States, based on the latest National Bridge Inventory data.
Which State Has the Best Bridge Infrastructure? Complete 2025 Rankings
Every state ranked by bridge infrastructure quality, from best to worst. See how your state's bridges compare on condition, age, and investment.
How Old Is the Average Bridge in Your State?
State-by-state rankings of average bridge age, with historical context about when America built its bridges and what that means for safety today.
America's Bridges Are Getting Better: A Decade of Data (2016-2025)
National bridge conditions have steadily improved over the past decade. We analyze the data behind the trend and what it means for infrastructure.
What Does "Structurally Deficient" Actually Mean?
The term 'structurally deficient' appears in every bridge news story. Here is what it actually means, how bridges are rated, and why the 0-9 scale matters.