Overnight delivery in large cities can be a problem for security reasons and/or because of a clash of interests among actors. For example, carriers prefer night deliveries because the huge traffic during the day, lack of unload areas, etc; while shippers prefer day deliveries to fulfil their customers’ requests. On the other hand, carriers have problem when the deliveries are in unsafe areas. Retailers prefer day deliveries because they would avoid extra costs with wages, for instance. In your opinion, which reasons (positive and negative) to/or not adoption overnight deliveries? Could you suggest me any research?