To amend title 23, United States Code, to require a life-cycle cost analysis for certain projects, and for other purposes.

Preserving America's Infrastructure Dollars Act of 2018 or the PAID Act of 2018 This bill requires the Department of Transportation to require each state to conduct a life-cycle cost analysis for each project of the state that: (1) receives federal highway financial assistancee; and (2) has an estimated total cost of $30 million or more.