National Freeway 3 (Taiwan)

National Freeway 3 (Taiwan)
Name	National Freeway 3
Length km	431.5
Established	1993
Direction a	North
Terminus a	Keelung
Direction b	South
Terminus b	Pingtung
Provinces	Taiwan

National Freeway 3 (Taiwan) is a major controlled-access highway traversing western and central Taiwan from the Greater Keelung area to Pingtung County. Designed as a parallel inland corridor to the coastal National Freeway 1, it links the Taipei City region with Taoyuan City, Hsinchu County, Miaoli County, Taichung City, Changhua County, Nantou County, Chiayi County, Tainan City, Kaohsiung City, and Pingtung County. The freeway supports freight, commuter, and intercity travel, integrating with rail hubs such as Taiwan High Speed Rail stations and international gateways including Taiwan Taoyuan International Airport and Kaohsiung International Airport.

Route description

National Freeway 3 begins near Keelung Port and proceeds southward through Taipei County and the Greater Taipei metropolitan area, intersecting arterial routes to Taipei Main Station, Songshan Airport, and the Keelung River. The freeway skirts the western foothills, passing near Yangmingshan National Park access points, Taoyuan International Airport connectors, and industrial zones in Taoyuan District and Hsinchu Science Park, before reaching urban nodes at Hsinchu City and the tech cluster around Miaoli County. Further south, the route runs adjacent to the western slopes of the Xueshan Range and Baguashan hills, serving commuter belts around Taichung Port and central plains agriculture in Changhua County. In the central mountains, the freeway provides links to Sun Moon Lake via connectors and tunnels that improve access for Nantou County tourism, while major interchanges near Chiayi City and Tainan City connect to cultural sites such as Alishan and Anping Fort. Approaching Kaohsiung City, the freeway interfaces with the Port of Kaohsiung, the Kaohsiung MRT network, and industrial parks before terminating near Pingtung County with connections to the southern coastal road network and ferry services to outlying islands like Penghu.

History

Planning for a secondary inland artery emerged during the rapid industrialization period of the late 20th century to relieve congestion on National Freeway 1 and to support new technology zones such as Hsinchu Science Park and the Central Taiwan Science Park. Initial feasibility studies involved agencies including the Ministry of Transportation and Communications (Taiwan) and the National Expressway Engineering Bureau, aligning routes to avoid urban displacement and to protect environmentally sensitive areas like Dajia River wetlands. Construction phases from the late 1980s to the early 2000s saw segments opening progressively, often timed with infrastructure projects such as the expansion of Taoyuan International Airport and the inauguration of the Taiwan High Speed Rail in 2007. Notable engineering works included long tunnels and viaducts to traverse the Xueshan Range foothills, built by contractors coordinating with firms experienced from projects like Sun Yat-sen Freeway expansions. The freeway’s development influenced regional growth patterns, stimulating investment in Taichung Science Park, Kaohsiung Port upgrades, and suburbanization around Tamsui District and Nanzao Township.

Exit list

The exit list comprises major interchanges, service junctions, and connectors organized by kilometer markers and administrative districts, linking to national and provincial highways such as Provincial Highway 1, Provincial Highway 17, and county roads serving townships like Daxi District, Toufen, Dajia, Douliu, and Puyan. Key interchanges include connections to National Freeway 1 at multiple points near Taoyuan, Hsinchu, and Taichung City, an interchange serving the Taiwan High Speed Rail Taoyuan Station area, and southern junctions facilitating traffic to Kaohsiung International Airport and the Pingtung Line. The corridor’s exits provide access to cultural and economic destinations such as Yilan County (via connecting corridors), Taichung Station, Chiayi Station, Tainan Station, and urban centers like Zuoying District and Xinhua District, while specialized freight ramps serve logistics parks and ports including the Port of Taichung and Port of Kaohsiung.

Service areas and facilities

Service areas and rest stops along the freeway offer fuel, retail, dining, and sanitation services, often co-located with local specialty stalls representing regions such as Hsinchu, Miaoli, Changhua, and Tainan. Major facilities near transport hubs incorporate parking for long-haul trucks, weigh stations regulated by the Directorate General of Highways (Taiwan), and traveler information centers linking to traffic advisories from agencies like the National Fire Agency and the Central Weather Administration for typhoon-season planning. Several service areas include tourist information connecting motorists to nearby attractions like Sun Moon Lake, Alishan National Scenic Area, Liuhe Night Market, and Anping Fort, while emergency recovery areas coordinate with law enforcement bodies such as the National Police Agency (Taiwan) and ambulance services from regional hospitals including Taichung Veterans General Hospital.

Traffic and tolling

Traffic volumes vary seasonally and diurnally, with peak flows during Lunar New Year and summer holidays affecting corridors to Alishan and southern beaches near Kenting National Park. Freight traffic to export hubs like Port of Kaohsiung and industrial zones in Taoyuan contributes to heavy-vehicle prevalence on sections near Hsinchu Science Park and Taichung Port. The freeway uses electronic toll collection systems coordinated by the Freeway Bureau and interoperable with national initiatives involving the Ministry of Finance (Taiwan) for revenue management; tolling structures differentiate between passenger cars, buses, and heavy trucks, and employ distance-based charges with exemptions or discounts for certain commercial carriers registered with the Ministry of Transportation and Communications (Taiwan). Traffic management integrates ITS technologies developed in partnership with academic institutions such as National Taiwan University, National Tsing Hua University, and National Cheng Kung University to provide real-time signage and incident response.

Future developments and upgrades

Planned upgrades focus on capacity improvements, safety enhancements, and multimodal integration with projects like additional lanes near Taoyuan, upgraded interchanges serving Taiwan High Speed Rail stations, and seismic resilience retrofits informed by research from the Academia Sinica and the Taiwan Earthquake Research Center. Proposed developments include express bus priority measures coordinated with the Taiwan Railways Administration and expanded freight bypasses to ease congestion toward Kaohsiung Port and Port of Taichung. Environmental mitigation initiatives aim to reduce impacts on habitats such as Dajia River tributaries and to improve stormwater management in collaboration with agencies like the Environmental Protection Administration (Taiwan) and local county governments including Taichung County and Nantou County. Continued investment is expected from national infrastructure programs and public-private partnerships involving domestic conglomerates and construction firms with experience on large-scale transport projects including the Taipei Dome and mass transit extensions.

Category:Roads in Taiwan