Diesel engine maker Cummins and truck builders Daimler Truck and Paccar are planning to build a $2 billion factory in Mississippi that would be the nation’s largest plant dedicated to batteries for commercial EVs.

The Wall Street Journal says it’s a sign that truckers may be ready to swap diesel for electric vehicles, as federal and state regulators push truckers to buy more of them. Electric trucks have been available for years, but trucking operators have been slow to invest in the vehicles because of concerns about cost and durability and a lack of battery-charging infrastructure to support trucks on long hauls.

A Daimler executive said the new factory will help lower the overall cost of the vehicles and in turn spur further adoption.