RIO DE JANEIRO — The president of Brazilian state oil company Petrobras resigned June 1, the latest fallout from a crippling truckers’ strike over fuel prices that has widespread implications for the future of Latin America’s largest economy.

In a small side room at Washington’s Union Station, this year’s Infrastructure Week kicked off with a keynote address from Transportation Secretary Elaine Chao. She again pointed to the private sector and state and municipal officials as being the key drivers on infrastructure funding. Before the secretary’s address, Austin, Texas, Mayor Steve Adler had offered the infrastructure intelligentsia in attendance a different message. A look at the week ahead for trucking on Capitol Hill.

U.S. Xpress Enterprises has launched an initial public offering of 18,056,000 shares of its Class A common stock, the Chattanooga, Tenn.-based company announced June 4.

Old Dominion Freight Line Inc. announced that by the end of the second quarter it will have opened five new service centers across the United States.

Carrier Pitt Ohio is testing two natural gas-powered Mack Anthem models equipped with Cummins Westport ISX12N engines as it seeks to use alternative fuels to reduce emissions.

International logistics giant DHL has been active in the United States this spring, laying the foundation for a major marketing and education center and growing a service facility in Florida.

The Oakland Portal, a new high-tech platform, has been introduced by the Port of Oakland, Calif., to provide a single point for information about its operation, according to the West Coast hub.

XPO Logistics this year plans to spend more than $90 million to purchase 770 new tractors for its less-than-truckload network in North America.

Spring traditionally begins the produce season in the United States, with Florida shipping the vegetables it grew during the winter months and California loading up its vast bounty of vegetables, fruits and nuts to be trucked across the nation.