The road beyond Dhulikhel drops precipitously, then turns up the Sun Kosi River gorge toward the Chinese/Tibetan border.
The road beyond Dhuilikkel is only one lane wide. 
mnli hypothesis: The road beyond Dhuilikkel is only one lane wide.  premise: The road beyond Dhulikhel drops precipitously, then turns up the Sun Kosi River gorge toward the Chinese/Tibetan border.