in inner cities there are limits to the improvements that can be made in the context of streets that are frequently narrow and the constrained efforts to do so often involve expropriations evictions and demolitions that are socially and financially costly moreover even insofar as the goal of allowing more cars in parts of a city is realised through these efforts the problems of congestion may only be shifted to other parts of the city rather than being resolved in any viable sense finally reliance on the expansion of the road network also raises concerns regarding the ability of the government of viet nam to provide necessary road maintenance in the future