# Evaluation of Different Work Zone Road-Occupation Schemes for Monorail Construction
## 7 Conclusions  
With the acceleration of China's urbanization process, the transportation network of cities is becoming increasingly dense. The original road network in the city can no longer bear the current traffic pressure, and the main measures to deal with urban congestion are to renovate and expand existing roads or build subways and suspension rails for transportation. Therefore, it is inevitable that there will be more construction work zones on urban roads, and the establishment of construction work zones at signalized intersections makes intersections, which are already bottlenecks in the urban road network, more congested, causing adverse effects on citizens and regional economic development. For a rapidly developing city, if long-term traffic congestion is created to alleviate future traffic pressure, it will not only be difficult to meet the travel needs of citizens but also violate the current concept of sustainable development worldwide, increasing motor vehicle emissions. Therefore, in order to alleviate the traffic pressure caused by the construction work zone on the intersection, the different forms of lane occupation in the suspension railway work zone were analyzed for different traffic volumes. This study established three schemes for different occupation forms and positions of work zones based on measured data and simulated them using VISSIM (2022 student). Then, this paper adopts a unique multiobjective decision-making method to evaluate the impact of different work zone occupancy positions on the operation of signalized intersections. In order to ensure the accuracy and comprehensiveness of the simulation results, five typical operational efficiency indicators and one safety indicator were selected for simulation modeling. Then, an evaluation table EWM was conducted for different suspension railway workspace locations. Based on the results of the data analysis, the following conclusions can be drawn. Each of the three schemes has its own optimal performance under different traffic conditions. Scheme 1 (original scheme) can be used for situations with low traffic volume at the west or east entrance. Scheme 2 is mainly suitable for situations with high traffic volume in the opposite lane, and Scheme 3 is mainly suitable for situations with high traffic volume. However, when the traffic volume at the east entrance is greater than 2133 veh/h, no solutions can solve the traffic problem, and all six indicators have seriously deteriorated. If different schemes are selected for the construction of a full-range suspension railway based on different traffic conditions, it is of great significance to reduce the driving interference, parking frequency, and exhaust emissions of vehicles at the intersection in the work zone. The entropy weight evaluation method model established in this article can quantify the impact of different suspension railway work zone locations on traffic operations under different traffic volumes. Furthermore, it reduces the degree of reduction in intersection traffic efficiency caused by the layout of work zones. As for Schemes 2 and 3, when the traffic volume in a certain direction of the intersection exceeds a certain threshold, the work zone placed in the opposite lane or in the center of the road should be considered to achieve better traffic efficiency. At present, various cities in China are constructing monorails, which is bound to generate a large number of construction work zones. For countries with relatively mature monorail development, such as Germany, France, the United Kingdom, and Japan, this article proposes a work zone evaluation method for the impact of work zones on intersections, which can also be applied to the expansion and maintenance projects of monorails. This evaluation method is based on the entropy weight method, which avoids the problem of subjective judgment by humans while considering traffic conflicts and traffic efficiency and regards carbon dioxide emissions as an important evaluation indicator for urban carbon neutrality.