The weekend is a term used to describe the last two days of the week, i.e, Saturday and Sunday. These are the days that are designated for rest and relaxation. Accordingly, many people move outside their homes to enjoy with their families and this results in a massive traffic. Therefore, on weekends the risk of being involved in a collision is heaviest.
The term for the idea that certain behaviors are more likely to reflect activity in one hemisphere than in the other is "lateralization", since these actions are "lateral" to one another.
