Its not all that quiet as this is the beginning time the bulk of rush hour begins. A low howling sound like a big fan begins at this time in the day from the hundreds thousands of vehicles, cars, busses and trucks all running around me. I'm sure much of the effects of this photo are a cause of the dust kicked up and exhaust from all those vehicles.... I'm at motel in Ouray Colorado this morning and indeed all is very quiet here, other then I can here the crows starting their day and calling out to each other.I recall a few mornings in my life that resemble your photo, and remember how serene and quiet it was. Thanks for sharing that repast.