Level of Service calculations are based on Austroads guidelines.
For each pair of legs of the intersection, a level of service is assigned. This refers to a score assigned from A to F; A being the best and F being the worst, depending on the average delay (i.e., average waiting time) of vehicles in passing through those legs of the intersection. This metric is majorly influenced by the worst average delay (the actual calculations used for this are explained later in this document) metric among all the legs of the intersection, i.e., worse the delay worse the performance of the intersection.
Level of Service calculations are based on Austroads guidelines.