When gas/petrol shortages occur, it is often because people fill up a 1/2 full tank, rather than waiting for it to be less than 1/4 full. This makes sense if yo

When gas/petrol shortages occur, it is often because people fill up a 1/2 full tank, rather than waiting for it to be less than 1/4 full. This makes sense if you do not have confidence that you will be able to find gas. But it also means more trips to the station, and a net shift of fuel to automobile tanks.