Given a travel related situation, and given a specific question about the situation, summarize the question into a title

Wiki gives us the following explanation of the use of high beams in a car:


  Main-beam (also called high, driving, or full beam) headlamps provide an intense, centre-weighted distribution of light with no particular control of glare. Therefore, they are only suitable for use when alone on the road, as the glare they produce will dazzle other drivers.


But what if you drive at night on a fully separated highway, such as the Autobahn? Are you allowed to turn on the high beams? I assume the middle barrier will prevent other drivers from getting blinded, but perhaps it would also be annoying to the drivers in the front?

Is it legal to turn high beams on when driving on a European highway with fully separated lanes?

A friend of mine went recently to the USA, and he was saying that he didn't go through customs when leaving. After asking at the information balcony in the airport he was told not to worry. Everything would be handled at the departure gate. Only the ticket was checked though.

Is this normal? how do they register the exit?

When leaving the US do you have to go through customs?

I have a refundable ticket taking me from 'A' -> 'B' and then 'C' -> 'A'. However, I have now made further plans, so that I do not need the C -> A ticket anymore. So, given the limited travel budget that I have, I'd like to have the return / final leg of journey refunded. 

The cost of the total flight was less than the one-way tickets from A -> B would be now, so it does not make sense for me to cancel the entire itinerary. I'd like to travel on the first leg, and have the second leg refunded if possible. 

p.s. I am not getting off at any layover. The flights from A->B and C->A are more than 15 days apart and I have my own ways of traveling from B->C independent of the airline. 


Can I have the final leg of a multi-city flight refunded?