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Members of Congress have been boasting that the new highway bill they passed will create as many as 3 million jobs, including construction workers, highway engineers, manufacturing and truck drivers.

Navistar International Corp. scheduled a conference call late last week with stock analysts, saying it would provide an “operational update” as rumors swirled about the truck manufacturer’s inability so far to offer a heavy-duty engine that can meet federal emissions standards without using credits built up with the Environmental Protection Agency.

The House approved a bill on June 29 that would block any federal mandate requiring the use of electronic onboard recorders on vehicles, including a regulation included in the highway funding legislation President Obama was expected to sign late last week.

Retail diesel prices declined for a 12th straight week, dipping 3 cents a gallon to $3.648, the Department of Energy reported, but a spike in crude oil prices could signal an end to the downturn.

President Obama signed the federal highway bill into law at the White House Friday afternoon, which will fund transportation programs through September 2014, C-Span reported.

Navistar International Corp. said Friday it will offer a new engine technology to meet federal and state emission rules by using a new, urea-based system for aftertreatment.

The U.S. unemployment rate held at 8.2% in June and trucking employment improved by 2,000 jobs, the Labor Department said Friday.

North American heavy truck orders fell 28% in June to 16,500, the sixth consecutive year-over-year decline, reflecting a seasonal slowdown and continued caution by potential buyers, ACT Research reported.