D.C. Council member Marion Barry was "doing fine" yesterday after checking himself into Greater Southeast Community Hospital on Thursday for treatment of dehydration, a top aide said.

Linda Greene, Barry's Council Chief of Staff, said that the forms releasing Barry from the hospital were being processed last night. It was the third reported hospitalization this year for the 69-year-old former mayor.

Barry (D-Ward 8) felt ill while waiting for a flight Thursday at Reagan National Airport. Paramedics were called, Greene said, and after taking Barry's vital signs, they decided that he did not need to go to a hospital emergency room. He was driven home from the airport by staff. Later, still not feeling better, he checked himself into Greater Southeast, she said.

Barry canceled plans to travel to Portland, Ore., to see that city's light-rail system. A similar system is being considered for Anacostia and Fairlawn.

Greene said that Barry still intends to appear today at a ribbon-cutting for a city project on Elvans Road SE that includes new sidewalks, handicapped ramps and improved lighting.

Doctors at Greater Southeast treated Barry several weeks ago for pneumonia. In January, he was treated at Greater Southeast and Howard University hospitals for flu-like symptoms.

While Barry was resting and recovering, his ex-wife, Effi Barry, was at Howard University Hospital receiving treatment for injuries from a traffic accident. Authorities said her car was hit by a sport-utility vehicle fleeing D.C. police in Southeast Washington.

The crash occurred about 9 a.m. in the 2300 block of Martin Luther King Jr. Avenue SE, police said. Effi Barry, 61, was treated at the emergency room at Howard and released yesterday afternoon. She is a consultant for the Sure Foundation, a nonprofit group that works with disadvantaged children.

"Her head hit the windshield," Greene said. "She is sore."

Police officials said they were chasing the SUV because it was the getaway car in the armed robbery of two construction workers. The robbery took place about 7 a.m. in the 2500 block of Sayles Place SE. The assailants fled in a beige Bronco with North Carolina tags and a vanity plate that read "The Big Dog," police said.

A police officer spotted the Bronco about 9 a.m. and pulled it over, authorities said. The driver sped off, police said, triggering the chase that ended in the crash. Police said they arrested the two robbery suspects.