Table of Contents
- The artery of transportation in Miryang will change, establishing core infrastructure connected directly to industrial complexes and highways
- As of June 2025, design is in the final stage... construction expected in the second half of the year
- Summary of main construction details: Includes tunnels, 4-lane straight road
- Expected Effects: Revitalization of logistics and industry + Resolution of local congestion
- Watch Points: Construction difficulty, budget increase, variables in resident negotiations
- Conclusion
- Small-scale Environmental Impact Assessment for the Miryang Bubuk-Sangnam National Road Construction Project
- Frequently Asked Questions (FAQ)
The artery of transportation in Miryang will change, establishing core infrastructure connected directly to industrial complexes and highways
The industrial logistics center of Miryang, Gyeongsangnam-do, is set to be significantly reorganized.
The Busan Regional Land Management Office is starting the construction of a 4-lane road for National Route 25 from Bubuk to Sangnam. This project corresponds to a 1.85km section connecting Jeonsapo-ri in Bubuk-myeon, Miryang City, to Yerim-ri in Sangnam-myeon, with a total project cost of 77.4 billion won. Key features include a 4-lane road and the Jongnamsan Tunnel (245m).
This project is anticipated to alleviate ongoing traffic congestion in downtown Sangnam and maximize logistics efficiency by directly connecting the Nano Convergence National Industrial Complex, Sapho Industrial Complex, and Nam-Miryang IC. Through this core road project, the industrial logistics environment of Miryang is expected to improve significantly.
As of June 2025, design is in the final stage... construction expected in the second half of the year
This road project was included in the 5th National and Local Road 5-Year Plan in 2021, and the basic and detailed designs began in earnest in 2022. Currently, the design is nearing completion, with approximately 90% of the entire design documents finished. In particular, the structural review of tunnels and bridges is nearly complete.
Additionally, major licensing-related negotiations, including strategic environmental impact assessments and traffic impact assessments, have mostly been completed, and we are currently compiling final agreements with relevant agencies such as the Ministry of Environment and the Nakdong River Basin Environmental Office.
Land compensation discussions have been ongoing since September 2022, and in February 2023, a route briefing and opinion collection process was carried out for local residents. Continuous negotiation through these processes is expected to facilitate the smooth progress of the project.
Summary of main construction details: Includes tunnels, 4-lane straight road
The types of roads include National Road Class III and auxiliary trunk roads. The total length is 1.85km, and the width of the road is designed to be 19.5m, constituting a 4-lane road in each direction. The vehicle speed is based on a standard of 80km/h.
In particular, the Jongnamsan Tunnel is a crucial element of this road section, consisting of ascending and descending lengths of 210m and 245m, respectively. This tunnel uses a natural ventilation method to facilitate continuous air circulation.
Four intersections are installed on the road, located at Sangnam, Gonoshil, Yeongsin Industrial Area, and Sapho Industrial Complex. The paving work will be done with asphalt, with a surface thickness of 5cm and a middle layer of 6cm.
The Jongnamsan Tunnel is a vital facility that passes through the mountain, focusing on minimizing the amount of cut soil and reducing environmental impact during the design phase.
Expected Effects: Revitalization of logistics and industry + Resolution of local congestion
Expected future schedule
| Step | Schedule (Expected) | Details |
| Completion of detailed design | Q4 2024 | Construction order after design VE and departmental review completed |
| Start of construction | Second half of 2025 | Start of construction after contractor selection (Expected) |
| Construction period | 2025-2030 | Approximately 5 years, with high difficulty in tunnel construction |
| Opening | Around 2030 | New bypass road opening |
Watch Points: Construction difficulty, budget increase, variables in resident negotiations
Complexity of construction
Although it is a relatively short section, various processes such as tunnels, cuttings, and intersections are required. In particular, geological and drainage conditions can have a significant impact on the construction duration.
Possibility of budget increase
The initial feasibility study estimated around 38.5 billion won, but the total project cost has risen to 77.4 billion won, reflecting the increase in material costs. Future design changes or site conditions may require additional budget.
Resident negotiation situation
Compensation negotiations are ongoing for agricultural land and housing areas included in Jeonsapo-ri and Yerim-ri. This is an important variable that can affect the construction schedule.
Conclusion
The construction of the new National Route 25 connecting Bubuk and Sangnam in Miryang is not just a road expansion. It establishes vital infrastructure for the development of local industries and will become a strategic project that will significantly impact the local economy.
Construction is expected to start in the second half of 2025, and if things proceed as planned, a road connecting the nano industrial complex and the highway is projected to open around 2030. This is a critical time requiring cooperation from the local residents, Miryang City, and the Ministry of Land.
There is a strong need for continuous monitoring and information sharing going forward. This collaboration will serve as the foundation for a successful project implementation.
Small-scale Environmental Impact Assessment for the Miryang Bubuk~Sangnam National Road Construction Project
Chapter 1 Overview of the Project
1.1 Background and Purpose of the Project
This task aims to facilitate rapid transport of cargo from the Nano Convergence National Industrial Complex and Sapho Industrial Complex to Nam-Miryang IC by requiring a bypass through the bottleneck section in Yerim-ri, Sangnam-myeon, connecting National Road 58 from Jeonsapo-ri in Bubuk-myeon to National Road 25 in Yerim-ri at the shortest distance through the establishment of a 4-lane national road, thereby shortening distance and time.
1.3 Progress and Future Plans of the Project
March 2017: Proposal of candidate projects for the 5th National and Local Road 5-Year Plan
September 2021: Completion of preliminary feasibility study for the 5th National and Local Road 5-Year Plan
September 30, 2021: Announcement of the 5th National and Local Road 5-Year Plan (No. 2021-1106)
July 25, 2022: Commencement of basic and detailed design services
September to November 2022: Discussions with relevant agencies (12 agencies and 20 divisions outside Miryang)
January 2023: Submission of the action plan for discussions with relevant agencies
January 10, 2023: Commencement of small-scale environmental impact assessment
February 22, 2023: Route briefings for residents (Sangnam-myeon, Bubuk-myeon)
March 20, 2023: Reporting the results of route briefings
April 2023: 1st design VE (route selection stage)
June 27, 2023: Design consultation (initiating stage)
September 1, 2023: Consultation on design policy with the Ministry of Land, Infrastructure and Transport
September 22, 2023: Field survey (soil environmental quality measurement)
October 13, 2023: Field survey (flora and fauna survey)
November 15, 2023: Field survey (groundwater quality measurement)
January 3-4, 2024: Field survey (air quality, water quality, noise and vibration environmental quality measurement)
March 4, 2024: Discussions with relevant agencies (2nd)
April 2024: 2nd design VE (results of detailed design)
December 2024: Water quality pollution total quantity agreement
February 2025: Discussion on small-scale environmental impact assessment (planned)
1.4 Project Details
a. Project Name: Miryang Bubuk~Sangnam National Road Construction Project
b. Location: Yerim-ri, Sangnam-myeon, Miryang City, Gyeongsangnam-do ~ Jeonsapo-ri, Bubuk-myeon, Miryang City, Gyeongsangnam-do
c. Project Scale: Length 1.85km, Width 19.5m (4-lane in both directions)
d. Project Duration: 2024-2030
e. Project Cost: 77.4 billion won (estimated feasibility study: 38.5 billion)
f. Project Executor: Busan Regional Land Management Office
g. Approval Authority: Busan Regional Land Management Office
h. Consulting Authority: Nakdong River Basin Environmental Office
We will explain the core details of the project.
The road classification is local auxiliary trunk road, which corresponds to National Road Class III. This road has a total length of 1.85km and is designed in a 4-lane form with a width of 19.5m.
The driving speed is set at 80km/h, and key facilities include four intersections and a 245m long tunnel.
| Category | Unit | General earthworks section | Separated earthworks section (one direction) | Tunnel section (parallel) |
| Number of lanes | Lanes | 4 | 2 | 2 |
| Total width | m | 19.5 | 10.5 | 10.0 |
| Road width | Lane width (m) | 4 @ 3.5 = 14.0 | 2 @ 3.5 = 7.0 | 2 @ 3.5 = 7.0 |
| | Center divider width (m) | 1.5 | - | - |
| | Right shoulder width (m) | 2 @ 2.0 = 4.0 | 2.0 | 2.0 |
| | Left shoulder width (m) | - | 1.5 | 1.0 |
Facility planning
Tunnel plan: Jongnamsan Tunnel (2-lane attached tunnel)
| Category | Item | Downhill | Uphill |
| Length | Total | L=210m | L=245m |
| Number of lanes | | 2 lanes | 2 lanes |
| Ventilation method | | Natural ventilation | Natural ventilation |
| Portal design | Start/end | Arch face wall type | Arch face wall type |
Intersection planning
| Intersection name | Location (STA.) | Intersection type | Access road |
| Sangnam Intersection | 0+000 | Plane 3-way | National Route 25 |
| Gonoshil Intersection | 0+200 | Plane 4-way | Sangnam-ro |
| Yeongsin Industrial Area Intersection | 1+640 | Plane 3-way | Sapho Industrial Complex 1st Road |
| Sapho Industrial Complex 1st Road Intersection | 1+846 | Plane 3-way | National Route 58 |
Overall construction plan
| Category | Details | Unit | Quantity |
| Earthworks | Cutting (soil) | m³ | 191,115 |
| | Cutting (blast rock) | m³ | 52,350 |
| | Filling (subgrade) | m³ | 36,464 |
| | Filling (roadbed) | m³ | 22,682 |
| Paving work | Surface layer (T=5cm) | m² | 47,710 |
| | Base layer (T=6cm) | m² | 40,555 |
| | Subbase layer | m³ | 13,675 |
| Drainage work | L-shaped drainage | m | 3,205 |
| | V-shaped drainage | m | 1,222 |
| | Cross drainage pipe | location/m | 16/361.96 |
| Miscellaneous works | Noise barrier | m | 174 |
| | Traffic signs | EA | 47 |
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Frequently Asked Questions (FAQ)
Q. What are the main purposes of the Miryang Bubuk~Sangnam National Road Construction Project?
To improve logistics efficiency and alleviate traffic congestion by connecting the Nano Convergence National Industrial Complex and Nam-Miryang IC.
This project involves the establishment of a 4-lane road and tunnel over a distance of 1.85km from Jeonsapo-ri in Bubuk-myeon, Miryang City to Yerim-ri in Sangnam-myeon. It plans to directly connect the Nano Convergence National Industrial Complex, Sapho Industrial Complex, and Nam-Miryang IC to maximize the efficiency of industrial logistics and play a key role in resolving existing traffic congestion issues in downtown Sangnam. It is expected to revitalize local industries and improve traffic environment.
Q. What is the current progress of the road construction and future schedule?
Design stage is approximately 90% complete, with construction expected to start in the second half of 2025 and completion planned for 2030.
The road construction for National Route 25 from Bubuk to Sangnam is over 90% finished in basic and detailed design. Licensing procedures for structural review, environmental impact assessment, and traffic impact assessment are also nearly complete, with land compensation and resident opinion collection underway. Accordingly, construction is planned to start in the second half of 2025, with the project duration set from 2024 to 2030. This timeline may be adjusted due to resident negotiations or budget changes during the construction process.
Q. What are the construction details and characteristics of this road construction?
It includes a 1.85km, 4-lane road and a 245m long Jongnamsan Tunnel.
This project pertains to National Road Class III and auxiliary trunk road, establishing a 4-lane road with a width of 19.5m. Key facilities include the Jongnamsan Tunnel, which uses a natural ventilation method and measures 210-245m in length, along with four intersections located at Sangnam, Gonoshil, Yeongsin Industrial Area, and Sapho Industrial Complex 1st Road. The designed driving speed of the road is 80km/h to ensure safe passage, and considerations for the natural environment are included in the design, such as minimizing the amount of cut soil.
Q. What are the anticipated difficulties or variables in the construction process?
Geological conditions for tunnel construction, potential budget increases, and negotiations for resident compensation are key variables.
The construction involves various processes such as tunnels, cuttings, and intersections, contributing to its complexity. Especially during the tunnel construction, geological and drainage conditions can greatly influence the construction duration. Additionally, the project cost has increased to 77.4 billion won compared to the initial feasibility study estimate, and changes in design and site conditions may necessitate additional funding. Lastly, successful negotiation of compensation for residents in agricultural lands and housing areas is vital for smooth construction progress and acts as an important variable affecting the schedule.
Q. What are the expected effects of this project on the Miryang area?
It contributes to the revitalization of logistics and alleviation of traffic congestion by directly connecting industrial complexes and highways.
The 4-lane construction project of National Route 25 from Bubuk to Sangnam will allow for the direct connection between the Nano Convergence National Industrial Complex and Nam-Miryang IC, resulting in improving the efficiency of cargo transport. This will facilitate a reduction in logistics costs and promote industrial development, while also alleviating traffic congestion issues in downtown Sangnam, ultimately enhancing the daily convenience of local residents. In the long run, it is expected to significantly enhance the competitiveness of traffic infrastructure in Miryang City along with revitalizing the local economy.