Maricopa County Air Quality Department is administering the EPA's Diesel Emission Reduction Act (DERA) State Clean Diesel Program grant.
A project as large as the Loop 202 South Mountain Freeway makes for some impressive pictures. Here's where you can check them out.
Ozone High Pollution Advisory issued for Mon. & Tues., April 23-24, 2018. This HPA is due to ozone levels expected to accumulate enough to exceed the federal health standard for ozone.
A road on a steep grade is one of the few clues available for participants in this week's "Where in AZ??" challenge.
Freeway construction isn't just nuts and bolts. If you know where to look, there are some beautiful things to see. The South Mountain Freeway project is featured in this week's Art of Transportation.
We applaud the hard work of our Adopt a Highway volunteers who cleaned up 1,500 miles of state highway last year.