A bicyclist is clinging to life after he was struck by an SUV in Brooklyn early Friday, cops said.

The 56-year-old driver — who had the green light — was in a 2019 Chevy headed east on Linden Boulevard when the 25-year-old cyclist attempted to head north at the Ashford Street intersection in East New York, against the traffic signal, around 3:15 a.m., cops said.

The SUV driver slammed into the cyclist, who was left with severe head trauma and a broken left leg, according to police.

He was rushed to Brookdale University Hospital Medical Center in critical condition, police said.

The driver stayed on scene and no arrests were made. Police are continuing to investigate the crash.