I am directing this to my fellow golf architects out there, but of course there may be others who can contribute.
Are you willing to share with me your most recent preference in terms of the minimum distance that you feel that needs to be kept between a boundary (in my most recent case, a road) and a driving range? Other issues are, of course, relevant, such as the arc of the practice tee, width of the landing area, protective screening etc.
Given an adequate width of landing area, I'd tend to draw the line at a minimum of 50 metres, i.e. from the boundary to the edge of the landing area. This includes arcing the tee to direct shots inside. This is a conclusion that I have reached by simply adopting the same principle as if there was a golf hole along the boundary. I have worked the centerlines at 70 metres from the boundary, so it is not uncommon for a fairway edge to be at 50 metres. Of course, the volume of shots hit is much greater on a popular driving range.
Any thoughts on this will be appreciated.