Next stop, Dyer Avenue! You can hear this announcement and more when you add MTH’s R17 New York City subway set to your layout. MTH has been building subway cars for the O gauge market for a while, but this is its first foray into HO scale subway cars. The R17 cars are equipped with the company’s Digital Command System. The model will also operate on Digital Command Control (DCC) and direct-current (DC) layouts.