SAFETEA-LU authorized approximately $1.2 billion annually for HSIP from 2006 through 2009, with similar amounts authorized via extension acts through 2012. HSIP funds are apportioned to States based on the following factors:

• 33.3% based on the ratio of lane miles of Federal-aid highways in each State to total lane miles of Federal-aid highways in all States.
• 33.3% based on the ratio of vehicle miles traveled on lanes on Federal-aid highways in each State to total vehicle miles traveled on lanes on Federal-aid highways in all States.
• 33.3% based the ratio of the number of fatalities on the Federal-aid system in each State to the number of fatalities on the Federal-aid system in all States.

Each State's SAFETEA-LU apportionment of HSIP funds was also subject to a set-aside for construction and operational safety improvements on High-Risk Rural Roads. HSIP apportionment data from 2009-2012 (consistent with the project data presented in the HSIP National Summary Baseline Report) is presented in Table 1 below. The apportionment figures represent the final HSIP apportionment after all set-asides and take-downs.

Table 1: Final HSIP Apportionments 2009-2012

The final HSIP apportionment represents the amount of funding available to States for the advancement of highway safety improvement projects. A summary of HSIP projects obligated from 2009-2012 is provided in the next section.