Phase 1 alleviated some of the traffic from inner Seoul to Bundang which is mainly residential and within the Seoul Capital Area. Phase 1 was and intersects with several subway lines in south-eastern Seoul as well as with the Bundang Line. Travel from one end to the other was 16 minutes. Construction lasted for roughly six years starting in mid-2005 and ended at the end of October 2011. Total cost between public and private sectors was estimated at 1.169 trillion won.