Road Development in Bhutan

For most of its recorded history, Bhutan was traversed on foot and on horseback. The absence of any motorable road meant that the 205-kilometre journey from the Indian border at Phuentsholing to the capital Thimphu required six days of hard walking along mule tracks through steep mountain passes. That changed with dramatic speed in the early 1960s, when the Third King, Jigme Dorji Wangchuck, set in motion a programme of modernisation that made road construction the cornerstone of the First Five-Year Development Plan (1961–1966). By the time of his death in 1972, Bhutan had more than 1,500 kilometres of road—built largely by hand in one of the world's most difficult mountain terrains.

The First Highway: Phuentsholing to Thimphu

Work on Bhutan's first national highway began in October 1960 and was completed in May 1962—a period of only nineteen months. The 174-kilometre route linking Phuentsholing to Thimphu was carved from forested hillsides with limited mechanisation, relying on the labour of thousands of Indian and Nepali workers brought in under Indian development assistance, alongside Bhutanese communities who contributed to the construction effort. The highway reduced the border-to-capital journey from six days to six hours and stood as the country's first exercise in large-scale infrastructure.

Indian involvement was strategic as well as developmental. In the early 1960s, India was concerned about its northern borders following the 1962 Sino-Indian War and moved to improve connectivity in the Himalayan frontier states. Bhutan's road programme benefited from this geopolitical context, receiving both financing and engineering expertise that the kingdom could not have marshalled independently. The first highway was inaugurated by King Jigme Dorji Wangchuck and became the foundation upon which all subsequent road development would build.

The Lateral Road and the East-West Network

Following the Phuentsholing–Thimphu highway, construction began in 1962 on the country's most ambitious infrastructure project: the Lateral Road (also known as the East-West Highway), which spans the length of Bhutan from Phuentsholing in the southwest to Trashigang in the far east. The road traverses the entire width of the country, climbing over passes exceeding 3,750 metres and dropping into deep river valleys, with spurs branching north to Paro, Punakha, and other centres. At its completion the Lateral Road ran to approximately 563 kilometres and remained for decades the country's primary arterial route.

By the mid-1970s Bhutan had around 1,500 kilometres of roads, and by 1989 the network had grown to 2,280 kilometres, of which some 1,761 kilometres were paved. The network expanded rapidly under each successive Five-Year Plan, with each plan allocating substantial funding to road construction and the upgrading of existing tracks to all-weather surfaces.

Farm Roads and Rural Connectivity

A distinctive feature of Bhutan's road development strategy has been the emphasis on farm roads—narrow, often unpaved tracks designed to connect remote villages and agricultural communities to the main highway network rather than to link towns to one another. By 2020 Bhutan's total road network exceeded 18,000 kilometres, of which farm roads accounted for more than 11,000 kilometres—roughly 61 percent of the total. National highways constituted approximately 2,840 kilometres and district roads around 2,070 kilometres.

Farm roads have transformed rural livelihoods by reducing the time required to transport agricultural produce to markets and by providing access to health services and schools. However, their construction in geologically unstable terrain has also introduced environmental costs, including increased landslide frequency and erosion. The challenge of maintaining the expanding network against the effects of the annual monsoon—which regularly closes hundreds of kilometres of road—remains one of the Department of Roads's most persistent operational demands.

Current Network and Future Plans

Bhutan's road network is administered by the Ministry of Infrastructure and Transport. The network is classified into national highways, dzongkhag (district) roads, gewog (block) roads, and farm roads, each with different standards and maintenance responsibilities. The Thimphu–Phuentsholing expressway project, backed by Asian Development Bank financing, marks the next phase of modernisation—replacing the winding original highway with a faster alignment that will further cut travel time on the country's busiest corridor. Bhutan's road history is inseparable from its development history: each kilometre opened has brought services, markets, and connections that were previously inaccessible to communities isolated by geography.

References

1. "Transport in Bhutan." Wikipedia.
2. "Lateral Road." Wikipedia.
3. "174 Kms: Bhutan's First National Highway." Kuensel Online.
4. "Master Plan for National Highways Connectivity." Asian Development Bank.
5. "7 Interesting Facts about the Roads in Bhutan." Daily Bhutan.