This is called negative pressure breathing, changing the pressure inside thelunsg relative to the pressure of the outside atmosphere. In contrast to inspiration, during expiration the diaphragm and intercostal muscles relax.
15' wide is too narrow for a double wide driveway and too wide for a single car and should not be used as a driveway dimension unless there is a reason. Driveway Width. 10 - 12 feet wide for a Single Car driveway. 14 feet wide if Surrounded by Walls. 18 - 20 feet wide for a Double Wide driveway.
The 39 foot street width spacing is 9.7 feet leaving 3.8 feet or 45.6 inches between vehicles. While the 29 foot street vehicle spacing requires opposing drivers to slow down and give the right-of-way, the 35 and 39 foot street vehicle spacing do not -- even when passing parked vehicles on both sides of the street.