Sani Pass is located in the western end of KwaZulu-Natal province of South Africa on the road between Underberg and Mokhotlong, Lesotho it is a route that connects Kwazulu-Natal and Lesotho. It is a notoriously dangerous road, which requires the use of a 4x4 vehicle. This pass lies between the border controls of both countries and is approximately 9 km in length and requires experienced driving skills. It has occasional remains of vehicles that did not succeed in navigating its steep gradients and poor traction surfaces, and has a catalogue of frightening stories of failed attempts at ascending the path over the Northern Lesotho mountains. While South African immigration at the bottom of the pass prohibits vehicles deemed unsuitable for the journey, the Lesotho border agents at the top generally allow vehicles of all types to attempt the descent. The Sani Pass dirt road was to be upgraded in two phases, with construction work commencing in December 2006. It was originally intended that the part from the Sani Pass Hotel to the Lesotho Border post be done in two phases, but this has subsequently been consolidated into a single 2nd phase. The borderpost between the two countries closes at 18:00 every day and the pass is often closed due to weather conditions, especially during winter. The Sani Pass was recently used in TV advertisements for the new Nissan 4x4 and Ford Ranger 4x4 vehicles.