The steep rise in road mobility that has taken place during the last decades has resulted in some negative effects that are relevant from a social and economic point of view, such as accidents, congestion, and air pollution. Solutions to mitigate these effects have resulted in improvements in vehicles, infrastructure, and planning. Among these improvements are Intelligent Transport Systems (ITS), or digital road maps, which are based on electronics, control and telecommunications. This book discusses highway construction financing; the balanced vehicular traffic model that describes traffic flow on highways; non-drivers as road users; road engineering and public-private partnerships in highway and transit infrastructure building.