Yes, TRAMWAYS is a Scrabble word!

Letter values in Scrabble US: T 1, R 1, A 1, M 3, W 4, A 1, Y 4, S 1.

Is it a valid word?

TRAMWAYS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

a conveyance that transports passengers or freight in carriers suspended from cables and supported by a series of towers
the track on which trams or streetcars run

Also: aerial tramway, cable tramway, streetcar track.