| Summary: | This paper utilizes the deterministic flow-interception model with the objective of locating truck weigh stations to maximize the total flow of trucks that are intercepted during their travel on the intercity highway network of the Kingdom of Saudi Arabia (KSA). The Origin-Destination (O-D) matrix of daily truck trips between each pair of the KSA’s 18 major cities and regional centers was assigned to the shortest paths between the O-D pairs. The flow interception model was then solved using two approaches: a mathematical programming (MP) approach and a (greedy) heuristic approach. The results show that the greedy heuristic gives a solution that is very close to the optimum in terms of the number of stations needed to intercept a given percentage of the truck flow. However, some of the station locations might not coincide with those given by the exact MP solution. Furthermore, the MP solution results show that 44 stations are needed for 100% truck flow interception, and that the existing 31 stations can intercept only 60.91% of the total truck flow. These 31 stations could intercept up to 98.73% of the total truck flow if relocated to the optimum locations. Keywords: Truck weigh stations, Optimum locations, Saudi Arabia
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