Bullough, John D. and Boyce, Peter R. and Bierman, Andrew and Conway, Kathryn M. and Huang, Michelle Kun and O'Rourke, Conan P. and Hunter, Claudia M. and Nakata, Akiko (1999) Luminous Intensity for Traffic Signals: A Scientific Basis for Performance Specifications. [Departmental Technical Report] (Unpublished)