For its medium-duty trucks, Kenworth takes production to the 425,000 square-foot PACCAR assembly plant in Ste-Thérèse, Quebec, Canada. Founded in 1999, the facility builds the T180, T280, T380 ...

Yes, semi-trucks are more than 120 years old. Joey Ingelhart/Getty Images. While the first diesel truck was built back in the 1920s, semi-trucks have a history that reaches into the late 1800s.