Because much of the geology is unstable, there are frequent slips and
landslides, which are aggravated by both summer
monsoon and winter snowstorm and
frost heave conditions. Teams of Indian labourers are housed at work camps in the mountain passes to be dispatched to clear the roads in the event of road blockage. The conditions in the work camps are poor, with the workers reduced to breaking rock into gravel on a piece-rate basis when not clearing the roads. An international aid project is under way to stabilize the worst sections of the road. A major
Japanese aid project seeks to replace most of the narrow single track bridges with two-way girder spans capable of carrying heavier traffic. There are no stoplights. During road closures, commercial and public vehicles are prohibited from attempting passes such as
Thrumshing La, however private vehicles may proceed at their own risk. Blockages at high altitudes must be cleared by both heavy equipment and manual labour. At times, clearing crews have considerable difficulty even reaching the pass. Along the Lateral Road, there are many sheer drops of thousands of feet at the roadside, notably around
Thrumshing La. The new road construction was met with fierce opposition by environmentalists; but the government chose to proceed with construction nonetheless. ==See also==