If the fluid pressure will decrease quickly in a car when the ignition says that one or more has been switched off. One or two could be leaking or the source could be a faulty check mechanism in the catalytic converter.
When you come to an intersection, follow this important rule (left, right, left). Look to the left first because vehicles coming from the left are closer to you. Look to the right. Take one more look to the left before you pull out.