Nevermind the road? The configuration of the road eliminated the most difficult task in hitting a moving target crossing at anything close to 90 degrees downrange and thus requiring the shooter to lead the target, as you know, and produced instead a pure elevation shot. Several orders of magnitude less difficult!
You would have been “sweating bullets “trying such a shot because you are a normal person, fully aware of all the ramifications of your actions. No one, anywhere has ever described Oswald as being anything close to normal. Had you suffered from his collection of mental issues, but still possessed you level of expertise, I would estimate that you could have gotten twice as many rounds on target.