Around seven million medium- and heavy-duty freight trucks circulate the United States today—and almost all are powered by traditional internal combustion engines (ICEs). This legion of vehicles generates more than 25 percent of total greenhouse gas emissions (GHGs) from the transportation sector, including carbon dioxide and nitrogen oxides, pollutants that threaten the population’s respiratory and cardiovascular health.
As truck transport continues to grow—with about 65 percent of freight tonnage expected to be shipped by truck in 2050—emissions grow as well. The United States faces a transition point where it must move toward renewable energy and zero-emission vehicles (ZEVs). Unlike their ICE counterparts, zero-emission…