A retired NYPD officer fatally shot himself on a service road to the Whitestone Bridge in Queens on Monday, police sources said.

The ex-officer pulled up to the service road and took his own life about 2 p.m., sources said.

For those contemplating suicide, the National Suicide Prevention Lifeline is reachable 24/7 at (800) 273-8255. They can also call 311 or 911 for help.

New York City also has several resources, including NYC Well — the city’s free and confidential hotline — that offers mental or substance-abuse help 24 hours a day over the phone, through its online chat or via text.