Maryland State Highway Authority commissioned Sabra Wang to conduct a study on the proper application and installation of video detection. You can contact either Ed Rodenhizer at MSHA (erodenhizer@sha.state.md.us) or Ziad Sabra of Sabra Wang (zsabra@sabra-wang.com).
Purdue University has also been conducting the same study for Indiana DOT. Professor Darcy Bullock is the contact(darcy@ecn.purdue.edu).
If you want information from a company who pioneered video detection, you can also contact Ross Davidson at Econolite (rdavidson@econolite.com).