NYC Subway Line Signs: Green Circles and Diamond for Lines 4, 5, and 6 #3564176 (License: Personal Use)

The image displays four distinct New York City Subway route markers: three green circles with white numerals “4”, “5”, and “6”, and one green diamond with a white “6”. In the MTA system, circular signs denote local service, while diamond-shaped signs indicate express service-specifically for the 6 train during rush hours on the Lexington Avenue Line. These standardized icons help passengers quickly identify train types and plan their trips.

This image is typically used on transportation guides, transit apps, official MTA resources, or urban mobility blogs to explain subway signage conventions. It serves users seeking clarity on NYC subway symbols, especially tourists or new riders trying to distinguish local vs. express trains.