I think a lot would depend on whether the target was approaching you in a near linear straight line, or traveling sideways across your field of view in azimuth.

I think a lot would depend on whether the target was approaching you in a near linear straight line, or traveling sideways across your field of view in azimuth. As described in the NY times article it sounds like the gun was set up to shoot straight down the road into the windshield of the approaching car.