A comprehensive research program for the characterization of storm water runoff from an Arizona highway was conducted from January through December 2007. The study area covered a portion of the Loop 202 freeway west of Mesa Drive to a retention basin east of Lindsay Road in Mesa, Arizona. Storm water samples were collected from two storm water detention basins and a discharge point to the Salt River. The study was conducted by manually collecting storm water samples with passive automatic samplers and analyzing them for various roadway constituents. A primary objective of this research effort was to establish baseline values of constituents in ADOT highway runoff, aiding in the evaluation of related best management practices. A total of 16 storm water samples was collected from the research area between January 2007 and December 2007.

This report examined the effects of freeway development on land use and property values. A case study was prepared for the Superstition Freeway (US60) corridor in Mesa and Gilbert, Arizona. Among the findings were the following observations:
* New freeways provide substantial benefits to users in the form of travel time savings and reductions in costs associated with operating motor vehicles.
* Access benefits are transferred from highway users to non-users through changes in property values.
Freeway construction may have an adverse impact on some properties, but in the aggregate, property
values tend to increase with freeway development.
* Not all properties values are affected by freeways in the same way. Proximity to the freeway was observed to have a negative effect on the value of detached single-family homes in the US60 corridor, but to have a positive effect on multifamily residential developments (e.g. condominiums) and most commercial properties.
* The most important factor in determining negative impact on property values appears to be the level of traffic on any major roads in the proximate area, which implies that regional traffic growth is more significant than the presence of a freeway per se.
* Given the beneficial effects of freeway development on the value of certain types of properties, local
governments may benefit from appropriate planning and zoning decisions in the vicinity of a freeway
corridor.