The people who are living in Great Britain or Ireland are used to driving on right side. Although they have some experiments about driving on left side, they didn't get good results. I think that they will not be able to change their habits because they have driven on right side for many years. Therefore, it is very difficult for them to change.

I drove in the UK for long years. I admit I found it strange at first when I cam out here but one gets used to so quickly. When in the UK i find it weird to drive on that side of the road.