(CNN) -- Pizza places have always been experts when it comes to delivery, flexing with remote drop-offs and robot delivery cars. But now they're facing a problem: not enough drivers. In early March, ...

Pizza places have always been experts when it comes to delivery, flexing with remote drop-offs and robot delivery cars. But now they’re facing a problem: not enough drivers. In early March, Domino’s ...

This is a preview. Log in through your library . Abstract This paper proposes models and algorithms for the pickup and delivery vehicle routing problem with time windows and last-in-first-out (LIFO) ...