We have always seen retractable traffic barriers paying their helpful role in controlling traffic. In fact, the main purpose of using a retractable barrier is to stop violence and accidents that can become the cause of major losses. Traffic barrier maintains the road safety and discipline that is the absolute need of present time. The barriers should be placed on the road as they guide audience when some construction work is going on ahead, the purpose of putting retractable bollard and other sorts of barrier on the road is to make people aware of the construction work going on. The...