The track is approximately 4 3/4" long with the Ho train track being approximately 7 1/2" long. Wires underneath carry current from one side to the other on both vehicle and train rails. Are pressed in similar to original rails, but these rails are about twice as thick, solid aluminum and rust resistant, making the life expectancy of this track to be greater than an original Tyco track! Piece is not perfect, but pretty awesome and works.