The 57-year-old woman, an NYPD employee, was hit on the street outside PS 56 in Woodrow just after 8 a.m.
Authorities say the driver was making a left from Woodrow Road onto Winant Avenue at the time of the crash.
The victim was taken to Staten Island University Hospital in serious but stable condition.
She reportedly suffered a broken leg and a broken wrist.
The 69-year-old driver is in custody with charges pending.
----------
* More Staten Island news
* Send us a news tip
* Download the abc7NY app for breaking news alerts
* Follow us on YouTube