on Tue Apr 10 07:10:28 2012, in response to Re: Middle Track on the Myrtle, posted by jasonnyc on Tue Apr 10 03:56:28 2012.
But that was a replacement for the original covering, which was a replacement for old wooden crossovers at either end of the station. The mid 2000 renovation of Wyckoff just replaced the older concrete crossover and made it somewhat bigger, and replaced the older wooden ones at either end too, which were unused for decades because the wood was rotten. The one at the South End was where the old south end mezzanine was (which was removed in the early 90's). The north end wooden one was where the old removed north end mezzanine once was. The old concrete one in the middle was where the original L train transfer stairways were (also now removed), which were two stairways, one leading up to either original platform, with the concrete slab in the middle to allow crossing over at platform level over the "express" track. The old north end wooden crossover, as well as the middle concrete one was removed in the 2000's renovation, as well as the old L transfer stairways removed and replaced with the center one there today.