OR-Library is a collection of test data sets for a variety of OR problems.
A full list of the test data sets available in OR-Library can be found here.
There are currently 8 data files. These data files are the problems solved in J.E.Beasley and N.Christofides "Vehicle routing with a sparse feasibility graph", European Journal of Operational Research 98 (1997) pp499-511. Test problems 1, 2, ..., 8 from that paper are available in files vrpfeas1, vrpfeas2, ..., vrpfeas8 respectively. The format of these data files is: number of customers, vehicle load capacity, vehicle distance limit x-coordinate, y-coordinate for the depot for each customer in turn: x-coordinate, y-coordinate, delivery quantity, drop allowance then the edges in the feasibility graph is the format: customer number (i), customer number (j) where the depot is denoted by customer number 0 and each edge in the feasibility graph appears twice, once as i,j and once as j,i The files are of size 150Kb (approximately).
Click here to access these files