with the reform the bus network has been fully reorganised into a trunkfeeder system and buses are now classified into five types which are serialnumbered and colourcoded to make it easier for users to recognise them traffic accidents have been halved during the last decade and citizens satisfaction has improved by since the city government introduced an evaluation and incentive scheme seoul d first the city seeks to improve citizens accessibility to public transport the seoul urban railway comprehensive enhancement strategy proposes to build two additional subway lines to connect the districts that are currently outside the catchment area