Vehicle routing problems have been the focus of extensive research over the past sixty
years, driven by their economic importance and their theoretical interest. The diversity of …

Over the past decades, the Vehicle Routing Problem (VRP) and its variants have grown ever
more popular in the academic literature. Yet, the problem characteristics and assumptions …

The vehicle routing problem is one of the most studied combinatorial optimization topics,
due to its practical importance and methodological interest. Yet, despite extensive …

The use of drones for parcel delivery has recently attracted wide attention due to its potential
in improving efficiency of the last-mile delivery. Though attempts have been made on …

Over the past few years, unmanned aerial vehicles (UAV), also known as drones, have been
adopted as part of a new logistic method in the commercial sector called “last-mile delivery” …

Urban areas worldwide face a significant environmental challenge which is increasing
municipal solid waste rate. Addressing its negative consequences necessitates …

In the vehicle routing problem with simultaneous pickup and delivery (VRPSPD), goods
have to be transported from different origins to different destinations, and each customer has …

Recently numerous machine learning based methods for combinatorial optimization
problems have been proposed that learn to construct solutions in a sequential decision …

Learning how to automatically solve optimization problems has the potential to provide the
next big leap in optimization technology. The performance of automatically learned …

In this study, we investigate a routing problem in urban transportation which considers time-
dependent travel time, multiple trips per vehicle, and loading time at the depot …