US infrastructure is falling apart - here's a look at how terrible things have become

America's infrastructure is in dire need of repairs.

According to the American Society of Civil Engineers' 2017 Infrastructure Report Card, which is published every four years, US infrastructure gets a D+ grade. It got the same grade in 2013.

The ASCE estimates the US needs to spend some $4.5 trillion by 2025 to improve the state of the country's roads, bridges, dams, airports, schools, and more.

The report breaks down the state of infrastructure in 16 different categories. Here's a look at each category's final grade, according to the organization.