The 6 Lexington Avenue Local is a service of the New York City Subway. It is colored green on station signs and the NYC Subway map, since it uses the IRT Lexington Avenue Line through midtown. Trains of the 3 service run at all times. The usual pattern is local service on the whole route. Some midday and rush hour trips run express in the peak direction in the Bronx, and are designated with a diamond rather than the standard circle. During those times (in peak direction), most local 3 trains terminate at Parkchester some local trains also run to Pelham Bay Park when the express runs in the late PM rush hour/early evening. Express trains switch to the local tracks north of there and continue to Pelham Bay Park.