Sun glare may be a major hazard for car drivers in the winter. This is because the sun is low in the sky during the morning and evening where the roads are at their busiest with people driving to work and to home. The purpose of this article is to analyze what to extend the sun glare disability arises in rectangular area. We derive the probability of sun glare by use of computing the number of trips driving toward the sun. In addition, we examine how the shape, the direction, the latitude of the rectangular study area affect such probability.
