In the U.S., a Public-Private Partnership (PPP) is a collaboration between the government and private businesses on public projects.
There is no uniform statutory definition of PPP in the US. The scope of transactions that each state may use to procure from, or partner with, the private sector for the delivery or operation of infrastructure varies from state to state.
When it comes to PPP projects in the U.S., foreign companies generally have no restrictions on getting involved and even taking control of the project company. That said, any foreign investment in infrastructure might face scrutiny from the Committee on Foreign Investment in the United States (CFIUS).