Assessing The Effect Of Different Traffic Management And Control Strategies On Vehicle Emissions Under Special Events

With the dynamic economic activities as well as people's material and cultural living standards, more and more urban special activities are being held. These activities bring opportunities and economic benefits to the urban development, while at the same time bring both traffic and environmental pressures to the cities. Facing the urban problems of the worsening traffic congestion and environment, various advanced traffic management and control measures have been applied to the existing transportation network and its management systems, which reduced traffic congestion and improved traffic operating efficiency to some extent. However, there have been few measures to reduce vehicle emission pollution that caused by transportation and few existing studies that analyzed the impact of special events on the regional environment. As a hint, this thesis studies the relationships among and integrates traffic management and control strategies under special events, a traffic simulation model and vehicle emission models, with an ultimate goal to develop a quantitative assessment approach for evaluating the effect of traffic management and control strategies on emissions. To this end, the thesis first builds a traffic simulation platform for special events by using the mesoscopic simulation model INTEGRATION. Then, it presents a vehicle emission model based on the data collected by using Portable Emission Measurement System (PEMS) and their Vehicle Special Power (VSP) distributions. Subsequently, in the light of two traffic management and control strategies, i.e. whether Variable Message Signs (VMS) are applied when a concert is held in Capital Gymnasium and whether travel demand management is applied when the opening ceremony is held in the Olympic Park, the thesis estimates the total emissions of the network and analyzes the temporal distributions of the emission intensity on the classified roads and some of the major affected roads, as well as spatial distributions of the emission intensity on the entire network. In essence, it evaluates the effects of different traffic management and control strategies on the emissions of the Capital Gymnasium surrounding traffic network and Olympic Park surrounding traffic network. As far as the contribution of the thesis, it provides a new approach that considers environmental factors when optimizing traffic management and control strategies under special events.