Volvo on Thursday said its US facility in Hagerstown, Maryland, will be its North American centre for Volvo Powertrain, a four-year investment that will prepare the facility for delivering next generation diesel engines for the Mack and Volvo truck brands, Dow Jones reported.

The report said the Hagerstown plant has been producing Mack engines since 1961 and recently delivered its millionth engine but Volvo truck engines currently in operation in North America are built at Volvo Powertrain's plant in Skoevde, Sweden.

Located about 75 miles northwest of Washington, DC, the Hagerstown facility has a total area under roof of about 1.5 million square feet, includes all design functions in addition to manufacturing, has earned registration of its quality system to the ISO 9000:2000 international standard plus the ISO 14001 international environmental standard and currently employs just over 1,200 people, Dow Jones said.