Quicker Than on Foot - Travel Words and Terms

Traffic does not really 'go round' at a crossroads (Answer 2): it goes across, or maybe turns.
There is an 'orbital motorway' round the outside of London, called the M25: if you really wanted to (though, why would you?), you could drive round and round it, because it is more or less like a great big ring that goes on and on forever. When ~ as sometimes happens ~ there is an accident or some other problem with the traffic, the radio news will say 'Expect delays at Junction X on the clockwise (or anticlockwise) M25', to identify in which direction the road is blocked. With most other, 'straight' motorways they would say 'northbound' or 'westbound', or whichever direction it was.

Double yellow 'no-parking' lines are a common feature of many British towns and cities. The law that introduced them was passed in 1960.
We feel you should know this before you start driving a hire car on our roads!

Make sure you know the difference between:
'May' and 'Must' (and 'may not' and 'must not', though these two mean more or less the same);
'More' and 'less'.

This is what you do at a 'request stop'.
Answer 3 would be right if you were already on board ( = inside ) the bus, but this question started by saying you were waiting for the bus (... to come and pick you up), so you were not yet travelling on it at that time.

Lights (or 'lamps', though this isn't usually what we say) are clearly the most important thing on a moving vehicle at night ~ otherwise there could be all sorts of dangers.

If you are frustrated or angry at waiting for a train that arrives late, you may feel one of the other answers is a better description of the rail company's attitude. But Answer 3 is the proper and usual wording, as and when they need to announce it.

In this question we are at the airport. A journey with a title like 'BA123' is probably with British Airways.
You would not go directly to the plane, but to a 'boarding gate' where staff will check your papers before they let you move into the aircraft.

Answer 2 is best. You could certainly ask 'Have you gone to Newcastle?' ~ but, perhaps a little strangely, English usually says someone has 'been to' a place.

'Without either (one thing) or (another thing)' is the language structure here.
Well done to all of you who have travelled to Britain from abroad, even if you were uncomfortable on the way. We hope your visit is worth the effort!

This is the usual way that trains are announced and described on British stations.