This paper will describe a 1963 study designed to evaluate further the use of color systems in guiding traffic through highway interchanges. The study was an outgrowth of a similar study conducted in 1959 which suggested that reflectorized color systems could be considered effective in reducing driver problems related to nighttime visibility conditions.
As with the 1959 study, traffic stream characteristics were measured before and after the color treatment was installed, and roadside interviews were conducted to obtain driver's reactions to the treatment.
