The AIGA has featured an interesting article called “The (Mostly) True Story of Helvetica and the New York City Subway.” Here’s a snippet:
Helvetica is the official typeface of the MTA today, but it was not the typeface specified by Unimark International when it created a new signage system at the end of the 1960s. Why was Helvetica not chosen originally? What was chosen in its place? Why is Helvetica used now, and when did the changeover occur?
To read entire article visit aiga.org