A Happening on Old Nogales Highway

This morning, while traveling north toward the airport on Old Nogales Highway, I saw a young man in a light colored shirt waving his arms rather frantically on the east shoulder of the road. Uncertain what he was going to do, I began slowing down from 55 mph when he suddenly dashed across the road, a car or two in front of me.

Just then another guy came out of the scrub to the same point. He was also waving his arms to get people to slow down. Barefoot, he dashed across both lanes two or three cars behind me.

Next was a policeman hopping into a sheriff's SUV facing south on the east shoulder. When he flipped his lights on, I jammed on my brakes, allowing him tear into the southbound lane, surely in pursuit of the two jaywalkers, or jayrunners.

What was going on?