People worry in Washington about mixing bicycles with street traffic, but in the suburbs Friday, it was a galloping racehorse that tested its luck amid the cars.

A 4-year-old gelding threw its rider after a morning workout at Laurel Park about 9 a.m. and was soon headed south on Route 1 at what a witness who followed it said was a brisk 30 mph.

After an outing estimated at 1.6 miles through parts of Prince George’s, Howard and Anne Arundel counties, according to the racetrack, Bullet Catcher was caught.

The horse, which has recorded one victory, and several finishes in the money in six starts, appeared essentially uninjured. But it was reported that the foray on blacktop might have caused abrasions on the horse’s feet.

“It was scary,” said Abel Castellano, a jockey, who had joined in the chase. “I have never seen anything like it,” said veteran trainer Charles Frock, who also aided in the capture.