A seagull intersection[1] or continuous green T-intersection[2] (also known as a turbo-T[3] (in Florida) or High-T intersection (in Nevada and Utah)[4][5]) is a type of three-way road intersection, usually used on high traffic volume roads and dual carriageways. This form of intersection is popular in Australia and New Zealand, and sometimes used in the United States and other countries.
Reid2004
was invoked but never defined (see the help page).