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.
FINE: $115 . PARKING RULE & REGULATION: Code 40 says you cannot stop, stand, or park within 15 feet of a NYC fire hydrant, on either side. However, between sunrise and sunset, a passenger vehicle may stand alongside a fire hydrant as long as the licensed operator remains behind the wheel and is ready to move the vehicle if required to do so.