Those orange poles or in the construction world, are called delineators. They can be used during daytime or nighttime activities. If youve noticed, theyre sitting on top of the concrete barrier walls along the West Selmon Extension project in the median. Theyre made with reflectors so that you visibly see the wall and dont drive into it. They also play a crucial part of communicating traffic flow and direction around businesses or construction site. They act as a guide that tells motorists and pedestrians which way to go. They can be used on long highways or through short stretches of road during construction.