Just how many people come to see the Macy’s Fireworks on July 4th? If you’re talking about viewing the fireworks close-up from vantage points in Lower Manhattan, the answer is 150,400. How do we know? ARA was asked to count all viewers on Manhattan’s east side below the Brooklyn Bridge including those on the FDR (closed six-lane highway), which pedestrians could enter after 4pm from several ramps normally used by cars. Employing 23 counting staff plus supervisors, ARA assessed visitor traffic in a fluid environment as the NYPD moved barriers and opened different access points to control the crowd. Where crowds moved swiftly, ARA employed multiple counters at the same location, taking the average of their figures to minimize human error. To the best of our knowledge, this is the first time a comprehensive plan has been put in place accurately measure attendance at a special event of this magnitude.