NEW YORK (CBSNewYork/AP) – As Mayor Michael Bloomberg moves forward with his initiative to add bike lanes throughout New York City and a proposed bike-sharing system, a new study may have some wanting him to hit the brakes.

Two Hunter College professors have produced a study that shows roughly 1,000 pedestrians are struck by bicycle riders each year state-wide. Half of those are in New York City.

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The authors of the study only counted pedestrians who were hospitalized after being struck. The authors believe, therefore, more than 1,000 people in New York are hit by bicycles each year.

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The study didn’t count the number of bicyclists who were injured.

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The study was done on behalf of the Stuart C. Gruskin foundation. Gruskin was killed by a delivery biker who was riding in the wrong direction on the street in 2009.