Nepal Transport Service (Nepali: नेपाल ट्रान्सपोर्ट सर्भिस) was the first, and for a time, the largest, Nepalese public bus line. The company was based in the capital Kathmandu and operated from 1959 to 1966. Its head office was located at 122 Asan Tyouda Tol, Kathmandu. The company was founded by proprietor Karuna Ratna Tuladhar (1920–2008) and Lupau Ratna Tuladhar (1918–1993) of Kathmandu. The brothers were former merchants who operated an ancestral business house in Lhasa that conducted trade between Tibet, India and Nepal.