The following links clarify exactly what P3s are and why they are critical for the future of transportation funding, not just in Colorado but throughout the nation.

The National Council for Public-Private Partnerships (NCPPP)
http://www.ncppp.org/ppp-basics/7-keys/

The National Council of State Legislatures (NCSL)
http://www.ncsl.org/research/transportation/funding-and-finance.aspx

Federal Highway Administration (FHWA)
http://www.fhwa.dot.gov/ipd/p3/index.htm