1. The plaintiff's appeal against the defendants is dismissed.

2. The costs of appeal shall be borne by the Plaintiff.

purport, purport, and.

Basic Facts

Around January 14, 2011, the Plaintiff of the instant construction project and the instant first construction contract announced a public announcement of the construction project for the expansion of airport railway facilities (hereinafter “instant construction project”), and the main contents thereof are as follows.

Construction scale: 300,645,000,000 won (estimated price: 273,314,000,000 won): Construction of line connecting airport lines from the airport search station to the high-sea station of airport railroads, construction of underground connections (high speed and autopsy station, improvement of Incheon Airport Station), improvement of airport railroads (high speed and autopsy station), construction, track construction, track, track, system (electric power, signal, communications) by the State under Chapter VI of the Enforcement Decree of the Act on Contracts to Which the State is a Party (hereinafter referred to as “instant joint supply and demand organization”) was selected as a person eligible for design and construction (T/K) on April 22, 2011.

On June 13, 201, the Plaintiff and the instant joint contractors entered into a contract for construction works for airport railway facilities (the first construction contract in this case) with the contract amount of KRW 9,150,900,00,000 for the contract amount of KRW 284,680,000 for the total construction period of KRW 280,00 for the contract deposit, KRW 113,872,00,000 for the contract deposit, June 14, 2011 for the date of commencement, June 31, 2011 for the date of completion, December 31, 2011 for the total date of commencement, June 14, 201 for the total date of completion, and December 31, 2012 for the construction works for airport railway facilities (the first construction contract in this case) (hereinafter referred to as the “the instant construction works”).

(B) Since then, the total construction period of the instant construction contract was 297,453,00,000 won, and the total completion date was changed on June 30, 2015). The modification of the train operation plan and the bid guide (A evidence No. 20, No. 198) among the contents of the instant construction contract, which are part of the details of the instant construction contract, stipulate detailed design standards for the train control system as follows.

(b) A ground facility (LEU and Balise should be installed) that can be operated with an existing ERTM/ETS Level 1 on a high speed train (KTX) system (2).