SAN FRANCISCO - MAY 13: A bicyclist rides her bike down Market Street on Bike to Work Day May 13, 2010 in San Francisco, California. Thousands of bicyclists are expected to participate in the 16th annual Bike to Work Day event that promotes exercise and helps reduce pollution. (Photo by Justin Sullivan/Getty Images)
A study by two Hunter College professors finds that about 1,000 pedestrians are injured by bike riders each year in New York state.
About half of those are on New York City streets.
The authors think the numbers are actually higher. The figures include only pedestrians who were treated at hospitals.
Injured bicyclists are not included in the study.
The professors did the study on behalf of the Stuart C. Gruskin Foundation
Gruskin was killed by a delivery biker who was speeding in the wrong direction on West 42nd Street in Manhattan.