Sitting beneath a 40-foot-tall red neon cowboy boot sculpture of his own design, artist Cameron Eagle recounted his personal connection to Route 66.“My grandparents had a farm, and the route cut their farm in half,” Eagle said. “They didn’t get upset about it because it was just the way it was.”So what did Eagle’s grandparents do when cars began driving through the middle of their Oklahoma farm? They built an underpass to allow animals to move b…