n Journal of the South African Institution of Civil Engineering = Joernaal van die Suid-Afrikaanse Instituut van Siviele Ingenieurswese - Variation in heavy vehicle traffic : technical paper




The patterns of variation in total traffic with time of day, day of the week and hour of the year (in descending order) are will known as a result of numerous studies in this area. Very little is, however, known about the variation in heavy vehicle traffic over these periods. In this paper the total and heavy vehicle traffic patterns are compared for weekly and annual variation. Also, a method is developed according to which the percentage of heavy vehicles can be determined for any of the 1 000 highest hours of total traffic. This is especially useful for calculating the percentage of heavy vehicles in the design hour.


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