Question to original link: How to make a "reflective tape" material in cycles?
I'm using Blender 2.78c, any ideas on making too. Nodes look different. I am trying make my signs Retroreflective for Farming Simulator 17.
This would be my suggestion on how to make this kind of material using a texture. The first node tier is defining the texture with transparency as the reflective material using Fresnel (Fresnel defines the glossy to be applied only almost face on), the second mix node just mixes it with a diffuse background (or anything else) using the alpha channel as the factor.
For added realism i would probably use a hexagon texture to simulate the granularity of such a reflective tape at a close up, like here: