Once in the station, riders boarded one of the ride vehicles, which moved continuously through the station close to one another, in order to rapidly speed up the throughput.
Millennium Force's theme song is played in the station while riders are boarding.
(By comparison, some 330,000 riders boarded and alighted TriMet's 16 daily WES commuter rail trains at the Beaverton Transit Center during the same period).
Most new riders boarded in the Bronx, Brooklyn and Queens at stations usually bypassed by many trains hurtling in from the suburbs to the north and east.
Once the riders have boarded, the vehicle is dispatched.
After riders have boarded, the restraints are secure and the train is dispatched, the train takes about a half turn to the left before beginning to the climb the Chain lift hill.
More than 26,000 riders boarded in Braintree, according to state transportation officials.
In the first workweek of the year, more than 8,000 riders a day boarded at the three stations (more than 5,000 of them at Anacostia), exceeding Metro's estimates.
Instead, they could allow the doors to remain open until all waiting riders have boarded.
After riders have boarded and the station floor is retracted, Superman: Krypton Coaster departs with a left turn out of the station.