Pasang Lhamu Highway (National Highway 18, NH18) (Nepali: पासाङ ल्हामु राजमार्ग) is a 65 kilometres (40 mi) National Highway of Nepal located in the Bagmati Province[1][2] it can be considered an alternative route of Trishuli Corridor (NH42) in Rasuwa District.

The highway starts near Machhapokhari in Balaju (Kathmandu) bisecting from Kathmandu ring road (NH39) and proceeds to Thulo Khola (Kathmandu-Nuwakot border) via Nagarjun.

The highway bisects from NH42 in Uttargaya Rural Municipality in Rasuwa District near Betrawati (Nuwakot-Rasuwa border).

The highway runs parallel to Trishuli River and Trishuli Corridor (NH42) making fifteen to twenty kilometres of distance.

[citation needed] Feeder road F021 was upgraded to NH18.