How many structurally deficient bridges have decreased over the last 20 years?

The correct answer is based on data showing that the number of structurally deficient bridges in the United States has indeed decreased by approximately 46,318 over the last 20 years. This statistic reflects the efforts made throughout the country to improve infrastructure through repairs, upgrades, and replacements of aging bridges.

The focus on reducing the number of structurally deficient bridges is crucial for safety and reliability in transportation. Addressing these issues not only enhances safety for drivers and pedestrians but also improves overall traffic flow and decreases the potential for accidents related to structural failures.

While other figures may suggest significant reductions as well, the specific number of 46,318 accurately captures the comprehensive assessments and improvements made in bridge conditions over the past two decades, demonstrating a concerted effort to address infrastructure challenges effectively.