R32 on C3/4.
The R32 holiday/farewell train is seen relaying through Tremont Ave Station on its way back to Manhattan. Rather than terminating on the middle track at 145th St, the train was relaying into the Bronx due to a GO diversion that would have sent southbound (D) trains via the express track south of Tremont Ave. This GO ended up being cancelled, so only two of the R32 trips actually relayed through the Bronx.
"C3/4" is the designation for this middle track on the Concourse Line. In the NYC Subway, B Division (BMT/IND) lines are designated as such: Track 1 is the southbound local track, 2 is the northbound local track, and 3 and 4 are the corresponding express tracks. When there is only one express track, it is referred to as Track 3/4.
