Boston's population density is 2200 per square mile or 800 per square kilometer. Also, perhaps surprisingly, Philadelphia is the least dense urban area in the world with more than 5 million population, while Chicago is the least dense urban area of more than 7.5 million.
Cargo fuel tanks shall not exceed 150 gallon capacity per vehicle. Vehicle transporting fuel in cargo tanks of 115 gallons or more shall display either a hazardous materials placard indicating identification number NA 1993 for diesel fuel or a placard indicating 'Fuel Oil'. When empty, the placard shall not be displayed.
What is the standard fuel tank size for economy cars? The average size of a small to mid-sized car's fuel tank is 12 gallons. There is no standard fuel tank capacity, as automobile manufacturers choose fuel tank sizes on the basis of many factors, including the design and fuel economy of the vehicle.