Clyde Mercury, 36, was charged with criminally negligent homicide, reckless endangerment, reckless driving and failure to exercise due care.
He is set to be arraigned in a Brooklyn court on Wednesday.
Police say the 37-year-old victim was killed after being struck by a Ford Transit that was traveling westbound on Myrtle Avenue between Walworth and Sandford streets in Bedford-Stuyvesant just before 2 p.m. Tuesday.
Eyewitness News obtained surveillance video showing the moments leading up to the crash.
Video shows the white van drive through the intersection and plow into the worker, apparently pinning him to another car.
The victim was seen wearing reflective gear, standing behind traffic cones and holding a flag to direct traffic away from a construction site at the location.
Paramedics rushed to the scene but were unable to save the worker's life. He was taken to Woodhull Medical Center where he was pronounced dead.
Witnesses say the white van was going too fast and was trying to pass a truck without the space or right of way to do so.
"He was going so fast, he lifted him up with his side mirror and wedged him between this truck, and when he hit the other car on the other side, he came to a sudden stop and the momentum threw the flagger forward and where he rolled up under the box truck and expired," said witness Michael Matson.
The investigation is ongoing.
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