The term intelligent transportation systems (ITS) refers to information and communication technology (applied to transport infrastructure and vehicles) that improve transport outcomes such as transport safety, transport productivity, travel reliability, informed travel choices, social equity, environmental performance and network operation resilience.
This advanced transportation system is regarded an appropriate policy option to the city of Ulsan where the city government is forced to meet the growing demand of urban transportation sector’s investment with limited financial resource.
In order to improve effectiveness of urban transportation system in Ulsan, the metropolitan government decided to adopt "Intelligent Transportation System" in the late 1990s. Based on the bill on "Optimization of Transportation System" enacted by central government, the city government established a comprehensive ITS plan in 2000 that all local ITS programs should be completed until 2005
The comprehensive local ITS plan designates five target areas (transportation management, electronic payment, urban traffic information, tourist information, and mass transportation) with special attention on both the increase of urban traffic efficiency and the improvement of mass transportation services.
Currently, bus service in Ulsan is played as only available mass transportation means unlike other Korean cities, where various urban transportation modes such as subway and tram are available. The heavy dependence on bus service causes several problems with regards to service schedules, convenience, and safety. Bus Information System (BIS), a subsidiary unit of ITS, provides the arrival and departure time to all bus station's information boards on real-time basis so that the bus user can reduce the waiting for bus service along with the improved convenience on mass transportation. In particular, it is greatly contributing to enhance the convenience of bus service for the residents lived at the peripheries of the city, where the very limited numbers of bus lines are in operation.