With continuous participation in the design of arterial national roads, the department is playing a significant role in the establishment of national road network. In particular, the department is leading the engineering market in Turnkey and Alternative design fields with superior technology and passion. The department is playing the role of pioneer in Public Private Partnership engineering market by accomplishing the best efficiency and providing creativity.
The department is preparing to advance into the global market, which is the new growth engine, for the future. It has established long term investment and growth strategy to become one of the engineering leaders in the global market.

Review of the properness in the establishment of national arterial road network : Pre-feasibility study of Andong~Youngdeok and Hamyang~Ulsan Highway projects, etc. Vitalization of cooperation between engineering companies and university research centers : Establishment of road design standards 2008.

Basic planning and design of national road network : Feasibility study of Yongdong Expressway widening(Yeoju~Manjong section). Improvement of traffic environment and goods movement : Basic and Detailed Design of World Cup Grand bridge and access ramp of Hannam Grand bridge. Installation of structural landmarks such as sea crossing bridges and undersea tunnels : Younggwang~Haejae national road construction.

Numerous turnkey and alternative bidding success through the application of patented technology : Alternative design of road network in abandoned mine area which secures safety and smooth traffic flow (Taebaek~Miro Lot 2-1).

The most numerous project proposals in Korea : Highways and national roads (regional and urban) etc. First Public Private Partnership Project to be proposed by private sector : Seoul~Chuncheon Expressway Project Numeorus bidding success in open bidding through experience and technical superiority : The 4th Daegu Outer Ring Road (Sangin ~ Bummul), Anyang~Sungnam Expressway, The 2nd Busan New Port Connector Expressway, The 2nd Yongdong Expressway.

Our highly qualified engineers have expertise in all phases of railway engineering from initial planning to final design. Our integrated engineering capability can be applied in various kinds of railway projects with various customer requirements. Our highly qualified professionals have expertise in all phases of railroad engineering operations, from initial planning through to final design.

Pre-feasibility of Gwangju metro subway line No.2, Pre-feasibility of 2nd stage Seoul Metro Subway Line No. 9. Pre-feasibility of Asanman Industrial Railway (Poseung~Pyoungtaek), Review of the cost properness for railway projects. Basic Planning of Railway Network in Gyounggi Province.

Establishment of National Arterial Railway Network for the 21st century : Basic and Detailed Design of Sungnam~Yeoju Double Track Railway, Basic Design of Wonju~Gangneung Railway, Detailed Design of Donghae Line (Jukbyeon~Bukmyeon). High-speed Railway : Basic design of Gyoungbu High-speed Railway Lot 13-4, Gyoungbu High-speed Railway Lot 14-2, Basic Planning of Honam High-speed Railway, Basic Design of Honam High-speed Railway Lot 6. Establishment of Metropolitan Railway Network : New Bundang Railway, New Ansan Railway, Sosa~Wonsi Railway, Sungnam~Yeoju Railway. Subway : Seoul metro subway line No.3, No.7, No.9, and Busan metro subway line No.2.

New Bundang Subway (Gangnam~Jungja), ¡°First subway BTO project to be proposed by private sector in Korea¡±. Jeonla Line (Iksan~Sinri) ¡°First Railway BTL Project in Korea¡±. New Bundang Subway Extension (Jungja~Gwanggyo / Gangnam~Jeongja) BTO projects.

Feasibility Study of Light Rail Transits in Korea (102 lines), Basic Design of Woi~Sinsul Light Rail Transit. Basic Design of Sinwol~Dangsan Light Rail Transit, Basic Design of Kimpo Light Rail Transit, Detailed Design of Gwangmyoung Light Rail Transit. Implementation Plan for Urban Maglev Railways, Feasibility Study of Metropolitan Express Railways. Technical proposal of Incheon and Gwangju Maglev BTO Projects.

Based on the foundation of numerous project experience accumulated in Turnkey and Alternative bidding, and Public Private Partnership projects, the department is preparing to be competitive in the global engineering market by enhancing structural safety, structure's harmony with the environment, and aesthetic view.

Construction supervision for Dolsan-Hwtae Yoendo Bridge * Cable-Stayed Bridge (Main span : 500m) The temporary works for constructing Handol Grand Bridge is a turnkey project (design and construction). Its purpose is to develop the region through the bridge on the national road 77 by connecting the province and island. Throughout constructing this bridge, it is expected to have the function of leading balanced regional development and a tourist spot. This bridge is a starting point of the whole project route. At the same time, the ending point, Geokgeum-Youngnam Bridge is planned to be constructed. Therefore, the whole project route is expected to be implemented in short time. According to the result of current situation of the project area, the length of main span should be longer than 500m. Also, the project area is over the deep sea and is located near sea farming area so the bridge should be constructed with large and medium sized equipment that can be used under the sea. Handol grand Bridge has been planned to be a cable-stayed bridge with 500m length of main span that can be used as a tourist attraction and a symbol of the region which would form the identity of the area. The Handol Grand Bridge was planned as the largest cable-stayed bridge in South Korea with 500m of main span. Handol Grand Bridge is the starting bridge of the Yeosu-Goheung bridge project and this became an important element of developing technology of Cable-stayed bridge in South Korea Detail design for Ulsan Grand Bridge and the approach road by public-private investment * Suspension Bridge (Main span : 1,100m) The purpose of Ulsan Grand Bridge and the approach road project is to implement detail design for Metropolitan arterial road from Meaam-dong in Southern part to Ilsan-dong in Eastern part, which is the part of the east-west city expressway project (Sinbok Rotary ~ whajeong-dong in Eastern part) The Ulsan Grand bridge section is located from Meaam-dong in Southern part to Ilsan-dong in Eastern part. Ulsan Grand bridge is a suspension bridge which has one span with two pylons putting both side at the end of bridge so that it must not prevent ships. The length of main span is 1,150m and this is the longest in South Korea and world third. Ulsan Grand bridge removed the risk of crush between ships and pylons by building it on the land (each side of the bridge) instead of building it under the sea. Also, it is considered to be changed adapting circumstances of the surroundings such as seaways, which may be widened, and docks for ships that approach near the bridge in the future. In addition, the bridge was designed considering several high technology below. 1. the extra strands for the suspension cable considering difference of tension between the side span and main span 2. the high-strength cables (1,960 MPa) that are used for the first time in the world 3. anchorage with tunnel type considering geographical condition for the first time in South Korea Basic and Detailed Design for Approach Road to Yeosu National Industrial Area, Lot 1 * Cable-Stayed Bridge (Main span : 430m) This project aim to construct a road which will link Yeosu ~ Myo island ~ Gwangyang. It is expected to reduce transport costs by shortening travel time. The project is expected to be completed by 2012. The project is consists of one section, Lot 1 (L=1.945km), of the total construction project (4 lots L=8.547km). For this project, Sambo formed a consortium with GS construction. The design for the approach bridge (L=650m), approach IC bridge (2ea, L=498m) were carried out by Sambo Engineering, and the cable-stayed bridge (L=760m) was designed by Yushin. The cable-stayed bridge (main body L=430m, steel composition with symmetrical type) is designed to maximize sens of openness, dynamism, strength by application of a vertical main tower. In addition, it is secured with a limit of 300m×52m, which allows for ships up to 4,000TEU to pass the bridge. Basic and Detailed Design for Keumkang 4th Bridge in Multifunctional Administrative City * Cable-Stayed Bridge (Main span : 250m) Keumkang 4th Bridge is located over a beautiful river, Keumkang. Therefore, its main consideration is harmonization of natural environment and the Multifunctional Administrative City. The concept for Keumkang 4th Bridge is "Keumgaram keeper" which is a river god to keep the Keumgang safe. The design motive of the pylon was a form of a falcon which lives in Yeongi Province and by adapting this design, U type of pylon was decided to be used considering openness for drivers as well. Also, the road network system for bicycles has been made, so that the cyclers can access the bridge and the natural river park near the bridge easily. In addition, an observatory and pavement for pedestrian has been designed for bridge and park users. This bridge is the first U type cable-stayed bridge of South Korea and it considered the harmonization of nature. The bridge is consist of concrete pylon and strengthening type of the edge box to maximize structural efficiency and to secure safety and stability from wind for construction. The length of main span is 250m to improve water flow capacity and through analyzing shrinkage and expansion of width of the bridge (due to temperature and precipitation), the stability was secured. The access bridge is a PSC Box girder. The main span (The standard span: 120m) is consecutive and applied FCM to minimize the construction near the river. Basic design for Boryung-Taean (lot2) road construction project * Cable-Stayed Bridge (Main span : 240m) This project is to construct a road between Daechen port and Anmyun island in Boryung Province on national road 77 (Busan-Incehon). Its purpose is to develop tourist attraction and improve life environment of the habitants by improving the transport system in the region. The main span consists of concrete pylon and edge type of steel composite bridge. The total length is 105m+240m+105m=450m. The rest of section is also designed with a steel composite bridge. Basic and Detailed Design for the 2nd Seongsan Grand Bridge(Worldcup Br.) * Cable-Stayed Bridge (Main span : 225m) This the 2nd Seongsan Grand Bridge is planed with purpose, as a part of establishment of arterial road network in Seoul city, to cope with increasing of traffic volume due to open Incheon International Airport, Sangam new town development also, to solve traffic difficulties of road around existing Seongsan Grand Bridge. This bridge is under construction as large scale bridge with 6~8 lanes, connect between Sangam-Dong and Yeondeungpo water treatment office and total length is 2,993m. - In main structures, cable-stayed bridge, main body(550m), are made with northern IC, southern IC. The Seoul city has awarded the prizewinner to design carried by Sambo-Yushine. Basic and Detailed Design for Yeonggwang~Haeje Road Construction Project * Cable-Stayed Bridge (Main span : 200m) This proejct is to connect between Haeje-Myeon and Yeomsan-Myeon in Jeonnam Province by bridge. So that, it is enforcing in order to accelerate development of backward area, improve living environment, increase revenue due to provide traffic convenience and vitalizations of tourism industry. This service is planed, total length :10.37km, 5 bridges/2km, 9 IC, 2 lanes in both direction, design speed : 60km/h. Main structure is Yeonggwang Grand Bridge, Main span : 450m, cable-stayed type , approach bridge is PSC BOX Girder. This Yeonggwang Grand Bridge is expected to stand for Gate of Hampyeong Bay. Basic and Detailed design for Cambodia Mekong River bridge construction project The purpose of this project is to connect Phnom Penh city and the new city world town and to plan the main route to cross Mekong River. The total length for the planned route is 3,763m and the main structure is Mekong River Bridge and its main span is 590m as a Cable-Stayed bridge and the total length is 2,927m. This road is categorized as level 2, and the design speed is 60km/hr. The width is 3.25~3.5m and it is a 4-lane road. Mekong River Bridge is the longest bridge that crosses the Mekong River and its symbolic meaning is important. Therefore, the cable-stayed bridge was decided as the type of the bridge. The clearance space for main span is designed based on the line for the containers that are approximately 5000 tons which operate to Phnom Penh Port. Turnkey for widening and paving Sangri-Yongjin road project * Cable-Stayed Bridge (Main span : 135m) Sangri-Yongjin widening and paving project is to connect Youngchun and Yongjin in Danyang Province over South Han River to improve accessibility of inhabitants and boost the regional economy. Also it is for balanced regional development through organizing tourist attractions including Kogurye folk tale village, Bookbyck tourist attraction, Danyang arboretum and Hwajeon Village. The total length of the project route is 2.66km and the width is 2-lane (9.5~14.7m). It consists of 1 bridge (300m) and 3 interchanges. To minimize pollution of the river, the number of piers was minimized for the Yongjin Grand Bridge which crosses the South Han River. Also, it is designed as a land mark with an extra-dosed type that harmonizes with the surroundings. The cycle path and pedestrian roads has been designed on the bridge to improve accessibility of the residents of Sangri and Younginri as well as the visitors. Also, it secured the rafting path by designing the length of the main span as 135m. Detailed Design for Namdo Grand Bridge * Arch Bridge (Main span : 160m) Namdo Grand Bridge, connect between Yeongnam region and Honam region, is planed to contribute increasing of revenue to local resident and to accelerate reconciliation both region. As Namdo Grand Bridge is 358.8m, approach bridge is concrete arch type, main span is Nilsen arch type.

[North Han River Bridge] The Extra-dosed bridge of the first railway bridge in South Korea This project is to make the existing single-tracked railroad to double-tracked railroad between Deokso and Yangsoo. This is to promote regional development by improving the transport system and tourist attractions near the Han River. By opening this railroad, it would only take one hour to Seoul from Yangpyung in Gyungki province. The length of North Han River Bridge is total 1294.5m. The superstructure type of main bridge is extra-dosed bridge with 650m length and the superstructure types of approach bridges are each PSC Box bridge and Preflex Beam Bridge. The width is 12.9m with double-tracked railroad. The pylon of main bridge is straight type with double sided cables and the cables are Parallel wires. The substructure is planed as a torchlight type of piers and well-foundation. The construction method is FCM. The extra-dosed type was firstly applied to North Han River Bridge in South Korea and from this, South Korea gained the foothold to design and construct extra-dosed bridges. Balheung Bridge of Through Arch Railroad bridge in Jeonla line (Turnkey) * Arch Bridge (Main span : 8m) This project(Extension of Jeonla line between Seongsan-Sinpung) is to extend Jeonla railroad line which is a part of South-North arterial railroad that connects industrial complex of South Sea area. Balheung Bridge is a land mark of this project and it crosses the existing Jeonla line and national road 17. Balheung Bridge is a superstructure type of Through Lohse Arch Bridge. Its length is 80m and it is designed to consider the clearance for ships that pass, structural safety and aesthetics of the long span bridge. The width is 13.2m with double-tracked. In addition, the fan-type hangers of arch were firstly applied in South Korea, of which strengths are structural efficiency and beauty of the structure. Mankyung River Bridge of double-tracked railroad bridge in Jeonla line (Iksan-Sinli) * Cable-Stayed Bridge (Main span : 80m) The purpose of this project is to provide KTX express rail services in Yeosoo, Sooncheon, Jeonju and to improve transport capacity of cargos that come from Gwangyang Port and Yeocheon national industrial complex by building double-tracked railroad between Iksan-Sinli on Jeonla line. Mankyung River Bridge crosses Mankyung River with 60¡Æ angle of inclination and it is planed as a double-tracked rail bridge with main span of 80m length to secure span length followed by River Design Criteria; L = 20+0.005Q = 50.11m < 50.50m Also, it is considered to secure stability of water tunnel at the starting point and to reflect the characteristic of the region to bridge aesthetics. The bridge is planned as a double-tracked finback bridge which has the symbolic meaning and the aesthetics, and it is firstly applied in South Korea. Also it is designed to prevent water pollution since it is not needed to be painted and it secures durability of bending and vibration by using PSC girder. In addition, it is made of concrete considering durability and maintenance. The approach bridge was designed by continuous girder bridge using finback type of PSC U girder and shall be constructed by economical full staging method (FSM) after examining the effect of the bridge to the stream because the design elevation of bridge is low.

Detailed Design of Jeonla Line Double Track Railway BTL project (Iksan~Sinri,2007). Detailed Design of New Bundang Subway BTO project (Gangnam~Jungja, 2007). Detailed Design of Gwangmyoung BTO Light Rail Transit (2008). Basic Planning of Woi~Sinsul BTO Light Rail Transit (2007). Basic Design of Kimpo BTO Light Rail Transit (2007).

Based on the technical expertise of successfully carrying out riverbed tunnel design under the Han river, the department is recently performing technical review on Korea-China Strait undersea tunnel and Korea-Japan Strait Undersea Tunnel. Historically, underground space has been developed as residence since stone age, and even today, underground space is still being developed. Currently, the department is researching innovative engineering methods to apply in the underground space development projects such as subway, tunnel, underground parking space, deep tunnel, and underground urban space.

The silver prize winner in ¡°2007 structure of the year¡± (Misiryoung Tunnel, 4.9km). Longest 3 lane road tunnel, Length 4.9km. First application of NMT and PCL methods in Korea (Jangsung Tunnel, Length 3.5km). Anyang~Sungnam Expressway (Anyang Tunnel), Taebaek~Miro National Road (Dogae 1,2 tunnel), Kyoungju~Gampo National Road (Yangbuk Tunnel), etc.

Longest railway tunnel in Korea (Solan Tunnel, Length 15.6km). First application of single shell method (Inclined shafts of Wonhyo Tunnel). Concurrent installation of earth pressure balance shield TBM tunnels in urban section. Gyoungbu high speed railway Lot 13-4, Lot 14-2, Donghae Nambu Line, Seoul Metro Line No.3, No.7, etc.

Application of earth pressure balance Shield TBM method for Han River section which requires high level of endurance against water pressure. Design of Istanbul Strait Crossing Tunnel that connects Asia and Europe. Research study for Korea~Japan strait undersea tunnel(Daema Island~Geojae Island, Length 200~230km). Various industry-university research projects for development of extensive underground spaces Numerous industry-university cooperative researches on underground space development with large diameter.

Design of railway deep tunnel (68m) in soft soil section (SCP, GCP, PDB, Preloading, etc.) Design of Cast-in Situ piles and Open Caisson. Foundation and lot design of New Port (1,050m / 600m), Design of 4 quay walls in the size of 50,000 ton, Design of revetment in the length of 280m. Jinju~Gwangyang Double Track Railway, Younggwang~Haejae National Road, Gwangyang West Connection Railway, Busan Newport 2-4 stage, etc.

The department has prepared transportation plans for several major metropolitan areas in South Korea, and many other cities in the world . The experts in the department concentrate in providing economical efficiency, constructable, and convenient transportation infrastructure to the public.
Major service field includes the establishment of master plan of road and railway network, Forecast of traffic volume, Analysis of economic feasibility, Development of Private Participation in Public Infrastructure Projects, traffic impact assessment of major transportation facilities Including road and railway facilities.
Also, the department has performed Research activity of new transit system, Traffic flow analysis and simulation research activities.
In addition, the department is participating in ODA(Official Development Assistance) projects as financial and technical, material support to enhance economic development and welfare of the developing countries that the government provide.

The department of Mechanics and Electronics carries out road, undersea, and riverbed tunnel system design of lighting, ventilation, and disaster prevention that ensure passenger safety and comfort. The department also carries out system design of rail, subway, light rail transit facility that are crucial to the overall operation. The department contributes to the prevention of global warming through the utilization of newly generated energy resources and minimization of energy usage.