More than half of executives think they will have an autonomous supply chain by 2025, according to a survey by EY Americas. It also found that 97% of those that currently have an autonomous supply chain experienced improved customer satisfaction and 90% reported increased market share.

FedEx will no longer provide air service for Amazon express shipping and will focus instead on servicing "the broader e-commerce market," FedEx said Friday. About 1.3% of FedEx's 2018 revenue came from Amazon, the company said.

Ongoing flooding of the Mississippi River has caused a logistics backup for railroads, trucks and river barges. There are nearly 300 barges delayed by fast currents and high water.

Amazon has developed and deployed two new warehouse robots models for its fulfillment centers. The company says the units are able to improve the safety of warehouse environments and improve speed and efficiency of operations.

About three-quarters of Americans live within five minutes of one of Dollar General's 15,597 stores, according to GlobalData Retail, and the retailer's growth into new merchandise categories is fueling efforts to create a more cost-efficient in-house logistics system. Earlier this year, Dollar General unveiled its DG Fresh initiative to control its fresh and frozen food supply chain and the Fast Track program to increase self-checkouts and speed click-and-collect programs.