If you look back too quickly you can't really process much information. Try snatching a glance behind and see if you can actually notice the colour of the car behind, the first three digits of the number plate or make actual eye contact with the driver behind. I find I need to look back longer to do any of those things.
If you look back too quickly you can't really process much information. Try snatching a glance behind and see if you can actually notice the colour of the car behind, the first three digits of the number plate or make actual eye contact with the driver behind. I find I need to look back longer to do any of those things.