Kucuk and Yildiz 3L-PDP benchmark instances

Each instance has 100 customers and up to 5000 boxes. The geographic data in problem sets ky_lr1 and ky_lr 2 are generated randomly, while those in problem sets ky_lc1 and ky_lc2 are clustered.

Problem sets ky_lrc1 and ky_lrc2 have a combination of randomly generated and clustered structures. Sets ky_lr1, ky_lc1, and ky_lrc1 have a short scheduling period, while sets ky_lr2, ky_lc2, and ky_lrc2 have a wider scheduling period, enabling multiple customers to be served by the same vehicle. The instances were created concerning the loading volume provided by a 20 ft ISO container defined as dimensions L = 587, W = 233, and H = 220.