Troopers arrested two drivers on charges of aggravated driving while intoxicated in separate incidents this morning on the Niagara Thruway in Buffalo, state police reported.

In the first case, troopers responded at 4:15 a.m. to a vehicle that had crashed into a concrete wall on the Porter Avenue ramp to the northbound Niagara Thruway, said State Police Sgt. Edward Dunning.

They arrested Mariely H. Rivera, 30, of Busti Avenue, on a charge of aggravated DWI after she recorded a blood-alcohol level of 0.19 percent, more than twice the legal limit of 0.08 percent.

Rivera and her passenger were transported to Erie County Medical Center but both refused treatment there.

In the second incident, David J. Kirszenstein, 27, of Sterling Avenue, was charged with aggravated DWI because he recorded a 0.21 percent blood-alcohol level. He also was charged with felony DWI because he has a previous DWI conviction within the last 10 years, Dunning said.

Kirszenstein had been traveling southbound on the Niagara Thruway near the South Ogden Street exit, though it wasn’t immediately clear what prompted troopers to stop him. He was taken to the Buffalo police lock-up and is set to be arraigned Monday morning in City Court.