The electric trucks have a side cargo door, more space and, critically, air-conditioning, promising some long-overdue relief for carriers, who haven’t had an upgrade since the 1980s. Postal Service and Post Offices, Electric and Hybrid Vehicles, Trucks and Trucking, Air Conditioning, Freight (Cargo), Postal Service (US) The electric trucks have a side cargo door, more space and, critically, air-conditioning, promising some long-overdue relief for carriers, who haven’t had an upgrade since the 1980s. NYT > Business