So, heading down the freeway, you -I hope- choose one of the lanes on the right half of the road because in America we drive on the Right.
However, if you were on a motorway in England, you would choose one of the lanes on the Left half of the road, because in the UK, they drive on the left.
Currently not a problem because there's a huge fucking ocean between them, so cars roll onto the ship from one side of the road and roll off it onto the other.
If we built a huge bridge, however, the cars would crash mid point:
UK
^ I V
^ I V
^ I V
<<<< CRASH!!!!!!!!!!!!!
V I ^
V I ^
V I ^
USA
STOP STOP! OK let's have a huge parking lot where we all stop and then leave driving on the correct side of the road for the country we're heading into.....
Or build a super bridge which solves this by lifting up the traffic coming from the US on the right side of the road and places it over to the left of the traffic coming from the UK, so it is on the correct side of the road as it enters the UK without having to interact with the oncoming traffic at all.
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The most difficult thing is the decision to act, the rest is merely tenacity Amelia Earhart
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