According to preliminary data from the National Highway Traffic Safety Administration, traffic fatalities in 2019 declined in all categories, with 36,120 people dying on the roadways, down 1.2% from 2018. However, the agency reported that crashes involving at least one large truck increased 1%. However, the Fatality Analysis Reporting System (FARS), which collects this data, includes large pickups in this category, so it’s unclear at this point whether tractor-trailer related fatalities...