The Illinois Department of Transportation (IDOT) recognizes, enhances and encourages green and sustainable programs in all facets of the transportation industry. IDOT’s mission is to provide safe, cost-effective transportation for Illinois in ways that enhance quality of life, promote economic prosperity, and demonstrate respect for our environment. IDOT understands that sustainability requires balancing overall societal benefits while considering what is economically sound and environmentally compatible.
The IDOT Highway Sign Shop in Springfield recycles 45,000 to 50,000 highway signs annually with the help of a four-jet Hydro-Stripper developed by Hydro Solutions, Inc. The signs make it back on the road shortly after they are reclaimed. The process conserves 427,500 pounds of aluminum every year, saving the state approximately $600,000. The environmental benefits of this effort include reducing waste, conserving water and preventing pollution by eliminating the need to produce new materials. The water in the hydro-stripping process is filtered and continuously reused, saving 190,000 gallons of water each year.