Cool! Where do you live?
I'm about fifty miles due southeast of Dallas, Tx.
In the twelve years I've lived in Texas, I've seen roadrunners on about a dozen or so occasions, in every instance (except this one), in one particular spot along the highway about 5 miles or so up the road.
When I got home today he was in my driveway, just off the road. I turned into the driveway and drove veeery slowwwly, and he hopped along ahead of me all the way to my yard, and then hopped up on one of my other cars and groomed himself (or herself) while I ran in and got the digi-cam.
280, we have loads of coyotes around here, but I doubt they eat many roadrunners. This little guy was outrunning my (large) dog just trotting along and not looking like he was trying very hard, and with as many cats and dogs, young goats, newborn cattle, etc we have around here falling prey to coyotes I doubt they are that concerned with a hard to catch and small meal like a roadrunner. Maybe out in the desert where the cartoons are supposed to be from they are more valuable prey to the coyotes, but I don't think here.
They do fly by the way.
p.s. One of my neighbors who is the original Ted Nugent, cruises the road in front of my house every dawn and dusk with his 30-06 and nails coyotes left and right like it's his mission in life. The farmers in my neighborhood go to sleep every night happily, and peacefully in the knowledge that the coyote slayer is on patrol. I think it might technically be illegal to shoot coyotes (or anything) from the road, but the game wardens probably fear they'd have their houses burned down by their neighbors if they enforced the letter of the law.