The Firefly Projects Rail Yard is a small yard off the Broker Line, located in Firefly Projects. It is found at the end of Ringo Street which connects to Mohegan Avenue. It is just north-west of the Broker - Dukes Expressway intersection.
The siding comes off the main subway track, just before the Hove Beach Station. Next to the highway, it comes down to ground level, but is protected from stray cars by a metal fence and yellow bars low to the ground. Many lines branch off into the train shed, but more continue to a siding.
Here a flatbed car and an oil holder are parked. There is also an engine wash, but the entrance is barred of with a gate. It appears to be a Car Wash, but with a track instead of a road. No-one is ever seen working at the yard and no trains call here, though the yard itself does not appear to be abandoned.
On the road nearby, many gang members spawn, and can attack the player if provoked. Some large buildings appear on the site, though these appear to be in a derelict state. A large building overhangs the yard. Across the road there is a derelict piece of land, full of car wrecks and an old shed.
In Grand Theft Auto: Chinatown Wars there is a barrier that prevents the player from accessing the rails.