In some examples, a network computer system can monitor a plurality of mobile computing devices to determine a current location of a corresponding freight operator of a plurality of freight operators. The network computer system can record the current location of each of the plurality of freight operators in a data store of the set of memory resources. Additionally, the network computer system can repeatedly query the data store to determine when at least two freight operators of the plurality of freight operators that satisfy a set of drafting conditions. The set of drafting conditions including a proximity condition as between the at least two freight operators and a candidate commencement location. In response to the determination, the network computer system can implement a drafting arrangement between the at least two freight operators.