  Evolving diverse sets of high quality solutions has gained increasing
interest in the evolutionary computation literature in recent years. With this
paper, we contribute to this area of research by examining evolutionary
diversity optimisation approaches for the classical Traveling Salesperson
Problem (TSP). We study the impact of using different diversity measures for a
given set of tours and the ability of evolutionary algorithms to obtain a
diverse set of high quality solutions when adopting these measures. Our studies
show that a large variety of diverse high quality tours can be achieved by
using our approaches. Furthermore, we compare our approaches in terms of
theoretical properties and the final set of tours obtained by the evolutionary
diversity optimisation algorithm.
