Johnpjpa's post reminded me of a flare tool I made.
We were disabled in the Ozark mountains in a very heavy rain-storm, I set out my trucker-style reflective triangles, but wanted to use flares for further safety, as the rain was heavy and we didn't have that much of a shoulder. I had great flares, the long-burning ones with a nail in the bottom for upright placement.
Only problem was that I couldn't get them into the asphalt shoulder. I tried propping them up, but they fell over with the wind and the heavy rain put out the flare. Even with no rain, a horizontal flare is not visible.
So, I took an old blower shaft, drilled a hole in the end, cut off the head of a concrete nail and welded it in. Paint, and it was ready to go. I have two pictures of it: