A Brooklyn man riding his bike in Sheepshead Bay Monday night was fatally struck and killed, marking the fifth traffic-related death in the borough since Friday morning.

Fidel Trinidad, 55, was riding south on Nostrand Avenue when he was struck near Shore Parkway by a green Audi SUV heading north, police say.

Fidel was taken to Coney Island Hospital with severe trauma to the body, where he was pronounced dead.

The driver remained on the scene of the accident, and has not been charged at this time.

This fatal accident comes after four people were killed in crashes between Friday morning and Sunday afternoon.

On Friday morning in East Flatbush, a 29-year-old man riding a scooter on the sidewalk without a helmet was killed after crashing into a gate, police say. The driver has not yet been identified.

Later that day, cyclist Jose Ramos, 56, was fatally struck at the intersection of Atlantic Avenue and Essex Street, police say. The driver in that incident fled the scene in a vehicle described as a white or light-colored sedan.

On Sunday morning, the 42-year-old driver of a Nissan Altima was struck by a Mercedes Benz E Class in Sunset Park, and was pronounced dead at NYU Langone, police say.

The 19 and 24-year-old drivers of the Mercedes fled the scene on foot, but were apprehended by police. There are no charges in this incident at this time.

Later that day, a collision in East Flatbush left a 24-year-old motorcycle driver, Joshua-Dixon Taylor, dead after being struck by the 25-year-old driver of a 2012 Infinity, who is in the hospital in critical condition.

Non-profit organization Transportation Alternatives released a statement calling for comprehensive plans or additional funds to be directed to “restore the promise of Vision Zero.”

"Another cyclist is dead and Mayor de Blasio is likely to ignore the traffic news, or, even likelier, blame everyone but himself for his continued failure to make streets safe," says Transportation Alternatives Director Danny Harris. “We cannot wait until January to save lives on our streets, but faces with Mayor de Blasio’s inaction, lack of leadership, and unwillingness to combat deadly car culture, we have no other choice but to shift our focus on how the next administration can succeed where our current mayor has failed.”

News 12 has reached out to City Hall for a statement.