Report to Congress: Operation of Neighborhood Electric Vehicles (NEVs) on Roadways with a Maximum Speed Limit of 40 mph (64 kph): Fuel Consumption Savings and Safety Ramifications Download file: Report to Congress: Operation of Neighborhood Electric Vehicles (NEVs) on Roadways with a Maximum Speed Limit of 40 mph (64 kph): Fuel Consumption Savings and Safety Ramifications