Access Area Linking Platforms in a Railway Station
Puzzle 13 of Art Studio Medium Pack
Question is: Access Area Linking Platforms in a Railway Station
and the answer is: CONCOURSE
Word Meaning:
CONCOURSE — A large open space in or in front of a building where people can gather, particularly one joining various paths, as in a rail station or airport terminal, or providing access to and linking the platforms in a railway terminus.
Definitions from Wiktionary.