One possible way to reduce traffic congestion is building new infrastructure projects.A primary disadvantage is that untested road effectiveness might lead to unknown results such as the level of acceptance and services on roads.As citizens and their activities locate closely together in the urban centre, many believe that transportation systems have to be improved by building new roads and repairing old infrastructure networks.While population density is a main cause of traffic congestion, building new cities including all services could reduce the pressure on roads.One major advantage is that an effective project plan and design can contribute to improving safety on roads, getting better life quality and reducing fuel consumption.