Today, it's Arizona's day. As part of my series of posts on "PPP/P3 LEGISLATION IN THE UNITED STATES. ONE STATE, ONE POST" I am writing this post to inform you all about a new bill passed in the state of Arizona in the US.The bill (House Bill 2396 ) signed Monday by Jan Brewer sets ground rules for the Arizona Department of Transportation to enter into "public-private partnerships" for construction, financing, operation and maintenance of transportation projects.The bill was sponsored by Rep. Andrew Biggs (R) and allows for a variety of delivery methods for transportation projects including design-build, DBM, DBFO, DBOM and DBFOM.The P3 agreements would also allow ADOT to enter into a concession period for no more than 50 years, which may be extended and would permit it to grant other units of government the authority to develop P3s.The signing of the bill is a positive development for Arizona and is seen as a necessary step to addressing the state's looming infrastructure needs and budget deficits.Its P3 law is similar to California's Senate Bill 4 whereby the bill gives state-wide and regional transportation agencies broad authority to pursue P3s without limits to location or number.Arizona joins California, New York, and Puerto Rico as states that have recently embraced P3s. I have personal interest in making clear that these P3s don't mean toll roads, actually the availability payments model is gaining acceptance and it is standing out as the best preferred model for P3s.In the next days I'll write a bit about the Doyle Drive P3 project in san Francisco, probably the first big P3 transportation project after California SH4 bill , and that is being designed with the availability payments model (as the succesful I-595 in Florida).