Do you turn off your engine at the gas station?

Gas station yes shut down but a truck diesel only fuel island has different rules . Diesel is not flammable its combustible. As to why truckers leave it idle its habit or a sleeping codriver that would be awoken with a shut down . It's EPA or state rules on idling that only allow short idle periods Every one of those trucks will have a diesel APU or refer compressor running at the pumps full bore. Not a safety issue be carefull when you apply joe blow gas station rules to comercial truck stations