As part of its ongoing work to help state legislatures analyze the options available relative to transportation funding, NCSL has concisely categorized and compiled the provisions of state law addressing public-private partnerships (P3s) for transportation. In 2010, a working group of state legislators and industry experts convened by NCSL published comprehensive guidance on P3s for transportation, Public-Private Partnerships for Transportation: A Toolkit for Legislatures. This toolkit helps those states that wish to embark on P3s or amend existing law with several principles to consider when drafting legislation.