National Freeway 1

National Freeway 1
Country	Republic of China (Taiwan)
Type	National Freeway
Length km	374.3
Established	1978
Direction a	Northern terminus: Keelung
Direction b	Southern terminus: Kaohsiung
Cities	Taipei, New Taipei, Taoyuan, Hsinchu, Miaoli, Taichung, Changhua County, Yunlin County, Chiayi, Tainan, Kaohsiung

National Freeway 1 is the primary north–south expressway on the island of Taiwan, linking the major metropolitan areas from Keelung in the north to Kaohsiung in the south. Commissioned during the late 20th century, it connects industrial hubs, ports, airports, and high‑speed rail stations, serving as a backbone for transportation between Taipei, Taichung, and Tainan. The freeway interfaces with other arterial routes, ports such as Keelung Port and Kaohsiung Port, airports including Taiwan Taoyuan International Airport and Kaohsiung International Airport, and corridors like the Western Line (rail) and the High Speed Rail.

Route description

The freeway begins near Keelung and proceeds southwest through the Taipei Basin adjacent to Tamsui River before skirting the urban core of Taipei and New Taipei. It continues past Taiwan Taoyuan International Airport near Taoyuan City and enters the Hsinchu Science Park region, serving industrial zones around Hsinchu City and Miaoli County. Further south it parallels the coastline through Taichung City and crosses the Dadu River vicinity to access the Changhua Plain and Yunlin County. The route serves the Chiayi and Tainan metropolitan belts, providing direct links to Chiayi Airport and Tainan Airport before reaching the greater Kaohsiung area and terminating near the Port of Kaohsiung and Zuoying district. Along its corridor, the freeway intersects major junctions with National Freeway 3, Provincial Highway 1, Provincial Highway 17, and connections to Xinyi District and Zuoying HSR Station.

History

Construction commenced under the administration of the Executive Yuan in the 1970s with planning inputs from the Ministry of Transportation and Communications and engineering designs influenced by international consultants and models from Japan and United States. Sections opened progressively from urban bypasses around Taipei through southern expansions to Kaohsiung in the 1980s and 1990s, intersecting development projects like the Hsinchu Science Park and port expansions at Keelung Port and Port of Kaohsiung. The freeway’s evolution paralleled major events including the lifting of martial law by the Kuomintang era government, economic shifts during the Taiwan Miracle, and integration with the Taiwan High Speed Rail alignment. Subsequent administrative reforms by the Directorate General of Highways and policy initiatives from the Council for Economic Planning and Development guided widening projects, interchange reconstructions near Taichung Station, and seismic retrofits following lessons from earthquakes such as the 1999 Jiji earthquake.

Infrastructure and engineering

The freeway comprises multi‑lane carriageways, long viaducts, and tunnel segments engineered by firms and institutions including the Industrial Technology Research Institute and international contractors. Key engineering features include span designs over the Dahan River and floodplain mitigation across the Changhua Plain, seismic isolated bridges utilizing standards influenced by the American Association of State Highway and Transportation Officials and retrofits based on studies from National Taiwan University and Taiwanese geotechnical research centers. Interchanges incorporate cloverleafs, stack interchanges, and collector–distributor lanes near industrial parks like Hsinchu Science Park and logistics hubs such as the Taichung Port. Materials testing and asphalt technology have involved collaborations with Taiwan Cement Corporation and research at National Cheng Kung University for durable pavement solutions under heavy truck loads linking to container terminals at Port of Kaohsiung and Taiwan International Ports Corporation facilities.

Operations and tolling

Operations are overseen by the Freeway Bureau under the Ministry of Transportation and Communications, coordinating maintenance with regional offices in Taipei, Taichung, and Kaohsiung. Toll systems transitioned from manual plazas to electronic toll collection involving the eTag system and license‑plate recognition trials, integrating payment platforms developed in cooperation with entities like Taiwan Mobile and financial institutions such as the Bank of Taiwan. Incident management protocols engage the National Fire Agency and traffic command centers connected to municipal emergency services in New Taipei City and Tainan City. Service areas and rest stops feature concessions by companies including Uni-President Enterprises and transport amenities aligned with tourism promotion by the Tourism Bureau.

Traffic and safety

Traffic volumes reflect commuter flows from suburban districts into Taipei and freight movements to ports and industrial zones including Hsinchu Science Park and Kaohsiung Industrial Zone, with peak congestion recorded near Taoyuan Interchange and the Taichung urban section. Safety programs implemented after major incidents involved the Ministry of Interior and traffic research from National Chengchi University, promoting measures like variable speed limits, weigh stations enforced by the Customs Administration for heavy vehicles, and signage standards developed with the Chinese Taipei Road Federation. Data from traffic monitoring systems and studies by Academia Sinica informed countermeasures against high‑risk segments, while collaborations with World Bank advisors influenced capacity enhancement and road safety audits.

Future developments and upgrades

Planned upgrades include widening select segments, additional interchanges serving growth areas such as the Taoyuan Aerotropolis and expansions near the Greater Taichung Metropolitan Area, integration with multimodal hubs at HSR Zuoying Station and proposals linked to the Miaoli Science Park. Projects under consideration by the Ministry of Transportation and Communications and financed through public–private partnership frameworks involve smart highway deployments, autonomous vehicle pilot corridors aligned with industry partners like Foxconn and HTC, and resilience projects in response to climate projections from National Applied Research Laboratories. Regional planning bodies including the Council for Economic Planning and Development and municipal governments of Taipei City, Taichung City, and Kaohsiung City coordinate environmental assessments and land acquisition negotiations with stakeholders such as Taiwan Power Company and local chambers of commerce.

Category:Roads in Taiwan