This is the 9416th most frequent Russian word.
трамвайный
Relating to a tram or streetcar.
Here, 'трамвайный' is used as an adjective describing the 'path' as being associated with trams.
Трамвайный путь проходит через весь город.
The tramway track runs through the entire city.
'Трамвайной' is used to indicate a stop (остановка) for trams, showing its associational meaning.
Мы встретились возле трамвайной остановки.
We met near the tram stop.
'Трамвайный' describes the route (маршрут) as specific to trams.