Rated 4 out of 5 by County sign department from DG3 Fluorescent Most of our temporary road work signs are currently using HIP, standard orange. This new DG3 reflectivity increases the viewing angles, and the fluorescent orange is better than standard orange in low-light conditions. All signs are important, but we feel that the temporary road work signs maybe be some of the most important. They are often in unexpected locations, and we want our road department to be as safe as possible.