Traffic Signal Community & Resources
The National Transportation Operations Coalition (NTOC) has set up a website offering "a public meeting place that provides members and the public with resource documents, discussion forums, member profiles, file storage and more to share traffic signal management and operations, safety, and maintenance information."
People interested in traffic signals can create a profile on the site and connect with other professionals. As of Oct. 5, 2011, there were 167 members on the site. There's also newsfeeds and event feeds related to the industry so visiting the site is a great way to get the latest scoop on signal technology.