Today's word could cause confusion both ways!
"Look someone's crashed into the central reservation!"
'Central Reservation' = Median on a highway
The first time someone mentioned the median to me, I had no clue in the world what they mean't, to me it mean't the middle range of 2 numbers!!
Equally if you are an American in the UK this is not somewhere you book tickets, that would be the 'bookings office'! Although I have heard central reservations used occasionally for tickets in the UK, so I think you're influence is spreading with this terminology.