Sustainability based rating systems have become quite numerous over the past few years.  It is estimated that there are over 200 individual rating systems for civil engineering projects. I thought it would be informative to share a summary of some rating systems that are or are currently being planned to be used by transportation agencies. It is hard to determine if these rating systems will eventually be consolidated into just a few credible rating systems or programs. Many programs that have been developed are specific to an organization’s operations, environmental needs, local context and sustainability philosophy.  Read More