# Evaluation of Different Work Zone Road-Occupation Schemes for Monorail Construction
## 2 Literature Review  
Through a literature review, it has been found that research on the impact of construction work zones on traffic can be broadly categorized into two main types. The first type involves analyzing and summarizing the effects of construction work zone configurations on nearby traffic safety and variations in traffic variables. The second type employs advanced instruments to collect actual data, including the geometric dimensions of work zones and traffic data, for the purpose of traffic flow modeling. [PERSON] [28] studied the lateral driving behavior of drivers in work zone environments, compared and analyzed the macroscopic traffic characteristics with and without construction work zones, and found that the vehicle speed decreased from 70 km/h to 50 km/h, and the efficiency of each lane capacity decreased. At the same time, based on vehicle trajectory data, it was found that the normal lane capacity value was higher than the road with a construction work zone. [PERSON] collected [21] traffic data from all work zones in New York during and after their removal, revealing that the saturation progress during the work area was relatively modest compared to the period following removal. This implies an increase in the saturation flow for each channel during the work area. When there are people or heavy equipment in the work area, drivers often adhere to the speed limit in the work area [29]. [PERSON] [30] used machine learning to predict the influencing factors of future work areas and found that long-term speed changes are important factors in predicting the impact of work areas on traffic. [PERSON] [10] developed a method for evaluating the impact of road construction work areas, (a) predicting the network level impact of road construction projects, (b) identifying key sections and corridors with the most severe expected construction impact, and (c) comparing alternative construction plans and schedules. Dynamic traffic allocation forms the basis for evaluating the regional impact of road construction and comparing alternative construction schedule plans. [PERSON] [31] studied the impact of lane occupancy in work areas on road capacity, determined queue positions and the maximum waiting time of vehicles based on changes in traffic volume, and calculated the length of construction work areas suitable for occupying half of the lane. Scholars have also used VISSIM (2022 student) simulation to study the impact of subway track construction work areas on the transportation environment from the perspective of environmental protection [17] and estimated the economic losses caused. The study by [PERSON] [32] is based on microvehicle operation, establishing a framework for the relationship between maintenance work areas and carbon dioxide emissions. Preventive maintenance of vehicles in the work area is the main source of carbon dioxide emissions, especially the variable speed and queuing vehicles near the work zone. [PERSON] [33] conducted a study on the impact of low-speed mobile construction zones on urban roads. The findings revealed that when traffic volume reached 2000 pcu/h, each lane was significantly affected, mainly due to lane-changing behavior in the rear lane of the low-speed mobile construction zone. At the same time, as the speed of the mobile construction zone increased, the average traffic risk decreased. The scholar proposed a microscopic model of traffic flow in a straddle work zone to capture the characteristics of no lane division and irregular boundaries that intersect with the straddle work zone, reflecting the effect of traffic flow from two opposite directions of the intersection road [11]. Finally, the entropy method was used for evaluation, and the results showed that the distance from the lower edge of the work zone to the centerline and the proportion of large vehicles occupying the work zone exerted the most significant influence on the signalized intersection.