## 1 Introduction  
Forest fires, floods, storms, volcanic eruptions, and droughts left about 606 billion people dead and nearly 4.1 billion injured or homeless around the globe between 1995 and 2015, as specified in a report published by the United Nations Office for Disaster Risk Reduction (UNISDR) [1; 2]. It accentuatesthat such disasters have caused economic damage worth over 2.0 trillion dollars, and that it leaves mankind vulnerable and helpless. When a disaster occurs, most of the existing infrastructure is either completely destroyed or severely damaged. Thus, making any use of pre-deployed communication services is almost impossible. More often than not, such disasters strike areas which are far from metropolitans, where the facilities are already at a minimal level. In such places, the effectiveness of any underway rescue operation is quite limited. Hence, researchers are constantly seeking methods whereby accurate and timely information could flow among the rescue teams, which can boost work-efficiency and lead to favorable results. The deployment of a cost-effective and reliable communication setup in such areas can make a huge difference. Fortunately, we are witnessing a revival of Vehicular Ad Hoc Networks (VANETs) as a concept that provides a simple and commercially viable solution to the predicament of emergency responses in post-disaster management scenarios [3; 4; 5]. VANET is superior to other potential technologies because of its readiness, low complexity, and comparably better coverage. It supports road safety, and traffic efficiency and management, as well as infotainment applications [6; 7]. In the very near future, the emergence of non-safety applications may generate a big market revenue by virtue of an increase in the number of vehicles that are equipped with sophisticated onboard wireless devices [6; 8; 9]. Nevertheless, the main applications of VANET, even today, revolve around safety and security. Although all the above-mentioned applications are significant in their own ways, we must keep in mind that the most critical role of VANETs lies in emergency response and disaster management systems [7; 10; 11] (these are also the key points of this study). Over the years, natural disasters have exponentially been increased, partly because of the change in global weather conditions and fast-growing industrialization of developing countries. This has put the focus back to the best use of today's highly-advanced technologies and the availability of solutions to long-standing scientific queries. In our previous study [11], the design of a prototype for a centralized emergency response system was presented, which works fine with the help of a Global Positioning System (GPS) under fixed circumstances using VANET. The challenging part of the current study is to design and develop an application for disaster management using an emergency response system with a user-friendly interface, and to implement the TestBed with the ad hoc configuration. This study would also be useful to the scientific society due to the goals and objectives of the designed applications. Since the proposed study was applied in a vehicular environment, it can be used to represent real-time statistics of an emergency response system, along with the disaster statistics of an affected area. It may prove effective for the scientific society as it shows the round-trip-time with reference to the number of hops along the route from the source to destination. The society may also take advantages to know about the reliability factor in terms of packet delivery ratio based on the hop-count value along the route within the network. Moreover, it might be helpful for the scholars and the scientific society to relate the delay for the emergency messages based on the characteristics of the network. Furthermore, this work proposes a TestBed and provides the flexibility to configure various mobility scenarios in a vehicular environment. Moreover, it carries out the evaluation of the proposed application on the configured TestBed.