There are, occasionally, some concrete barriers on the road to Munsiyari, Uttarakhand. Wonderful views, too! Born Idiots writes:
In June, we went to Munsiyari, Uttarakhand, which is a narrow and dangerous Himalayan road. As we climb up the kumaon ranges, roads get narrow and dangerous, many times without any barriers. There is a steep fall down the mountain and driving on it keeps you on the edge of your seat. Special mention of the brave HRTC bus and truck drivers who drive on these roads on a daily basis.