Signalized intersections influence urban traffic networks’ performance. The design and operation of signalized intersections rely critically on the saturation flow rate. Despite the importance and the use of saturation flow rate, most of the transportation agencies do not collect data form the field. Instead, they use Highway Capacity Manual (HCM) suggested values, which are not necessarily applicable to different cities around the world. The saturation flow rate varies from one place to another. Therefore, using HCM’s suggested value can over or underestimate the actual local saturation flow rate. This may lead to wrong estimation of the intersection capacity and performance. The purpose of this research is to estimate saturation flow rate of signalized intersections in the UAE for each lane group under prevailing local conditions. Such values will help local transportation authorities to have a better estimation and optimization of signalized intersection performance, in the UAE. The results show that the mean saturation flow rate for through lanes, shared through and left lanes, and left turn lanes are 2104, 1904, and 1603 vehicles per hours, respectively. The obtained value for the saturation flow rate for through movement is higher than HCM’s suggested value by about 11%. Therefore, using HCM’s suggested value can lead to underestimation of local signalized intersections’ capacities. In addition, this value is less than saturation flow rates measured in other GCC countries due to strict traffic laws in the UAE

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