In the present condition, the advent of transportation technology allows users to use road transport for their mobility needs. However, rising populations and increased public transportation networks have increased traffic levels. Flyover construction is implemented in smart cities for the easy movement of vehicles. Significant drawbacks during the construction of the flyover are the diversion of roads that leads to traffic congestion, the greater travelling distance to reach the destination point, and the fuel consumption of vehicles. The level of air pollution due to automobile emissions leads to health-related issues for the people residing near the flyover construction places. The air quality is based on the level of emission components like Carbon Monoxide (CO), Carbon Dioxide (CO2), Particulate Matter (PM), sulphur dioxide (SO2), Nitrogen Dioxide (NO2), Ozone (O3), and Lead (Pb). The real-time case study is carried out in the flyover construction of Gounder Mills. Gounder Mills flyover starts from Vellakinar Pirivu and ends at Government ITI with a 658m stretch. The solution to overcome the diversion route is to provide the service road. The real-time case study surveys people who use the diversion route regularly to reach their workplace. The study focuses on air pollution, construction delays, and energy usage associated with a flyover. The air quality is measured during the peak hours in the morning and evening by PM 2.5, PM 10, and AQI sensors. The time delay estimation is based on diverse cars going and entering on the road. Humps and dumps roads are assessed to the free straight road using data collected from a mileage testing container at a designated flyover construction site. Air quality index (AQI), delay computation, and vehicle fuel usage in humps and dumps roads are used to evaluate the case study.