## 1 Introduction  
The ability to make cities smarter has never been easier than it is now, due to the advent of cutting-edge technology. The \"smartification\" of cities is essential for the modern era's growth and the improvement of metropolitan areas and their underlying infrastructure. To better serve their inhabitants, towns might benefit from using recent technology. Without a doubt, smart cities have many good effects on the quality of life of their residents, such as making transportation better and reducing the damage they do to the environment [1; 2; 3; 4; 5; 6]. One of the benefits of smart cities is that they can combine systems that check the health of buildings with artificial intelligence and other new technologies to make urban infrastructure work better [7]. The most important and the foundational component of a city's resources is its infrastructure. The urban structure is the result of a network of interrelated structural variables. A city's growth and development depend on the appropriate implementation, development, and maintenance of its infrastructure. Because of this, in addition to the construction of the infrastructure, it must also be both developed and maintained at the same time. As a kind of transportation infrastructure, bridges were among the first infrastructure that was constructed by humans. Nevertheless,in today's urban management, the bridge is considered a structure for crossing geographical constraints in order to optimize the use of available space for mobility and access to destinations. Therefore, it can be claimed that bridges are a vital piece of urban infrastructure, and proper monitoring of their health can extend their service life. Also, one of the most important issues related to urban management in smart cities is the SHM of bridges, which can increase their lifespan and efficiency [8; 9; 10; 11; 12; 13; 14; 15]. One way to prevent damage and cut down on the cost of fixing this infrastructure is to keep an eye on the bridge's structure and look for signs of possible damage. Traditionally, procedures such as frequent visual inspections by technicians, the magnetic method, and the mechanical wave (vibration) method were used to keep track of, regulate, and test the state of bridges [16; 17]. Hence, SHM bridges have been plagued by defects and inefficiencies in the past. Even though a substantial amount of research has been done on how to find and analyze bridge damage, most data on bridges that are already in use is still gathered by looking at them. However, despite the fact that these approaches have been used for decades to evaluate bridges, they have significant drawbacks and do not always work, even though they are used for a broad variety of examinations. Non-destructive testing (NDT) and non-destructive evaluation (NDE) are two ways to classify these kinds of controls [18; 19; 20]. The lack of accessibility and inspection of all bridge components is a major downside of eye-based monitors as traditional methods. In addition, there is a chance that a technician will make a mistake or misinterpret a sign of danger. It should also be noted that in some cases, damage may start from the internal elements of the bridge structure, and this issue cannot be seen by visual inspection. There are many other problems, including the suspension of operations and servicing of bridges when the bridges need to be tested and inspected. In the event that this process may lead to financial damage, or even in some cases due to the high volume of traffic, there may not be a service stop for the bridges [21; 22]. The advancement of structural systems and the technology used in them has unquestionably led to the creation of the smart city. In the last few decades, thanks to a lot of technological progress, a good foundation for monitoring systems for bridge structures has been built. This will help bridges, which are an important part of urban infrastructure, work better.