Note that you're describing the main operating mode in the last paragraph - this holds true for parking lots as it does for other shared spaces (who should be p

Note that you're describing the main operating mode in the last paragraph - this holds true for parking lots as it does for other shared spaces (who should be paying attention is somewhat academic). Over 20 mph, the tires are the main noise source even with gasoline cars (unless you take off the exhaust muffler, which is a bit of a corner case).