A strike by UPS workers if a new labor agreement isn’t reached with the Teamsters would hold significant implications across the supply chain, industry analysts said.

Knight-Swift Transportation Holdings closed on its previously announced acquisition of U.S. Xpress Enterprises, the company announced July 5.

Negotiations on a new labor deal between UPS Inc. and the Teamsters stalled July 5 after showing promise over the weekend, renewing concern that workers could strike at the end of the month.

Most of North America’s largest for-hire carriers operating in many diverse segments of the trucking industry reported higher revenues last year.

With more drivers and equipment to manage, some fleet operators have implemented technology to help navigate the complexity of the industry’s regulations and better manage safety audits.

According to reports from the American Transportation Research Institute, truck parking has been one of the industry’s top concerns for several years.

In the years ahead, the essential task of hauling the nation’s freight and keeping the economy rolling will increas­ingly shift to a new generation of professional truck drivers.

Despite a softer freight environment, most of the largest trucking companies in North America continued to grow their businesses last year even as spot market rates dropped.

In contract negotiations between UPS Inc. and the Teamsters, the two sides have come to agreement on dozens of matters to clear the way for talks on pay and other major issues.

Sen. Bernie Sanders (I-Vt.) launched an investigation into charges of unsafe working conditions at Amazon.com Inc. warehouses across the U.S.