The Department of Roads (DoR) has finalized the Detailed Project Report (DPR) for the reconstruction of the BP highway section between Bhakunde Bensi and Nepalthok, which suffered extensive damage from floods and landslides last September

As per the DPR, the reconstruction of the 28-km stretch is estimated to cost Rs 9.66bn and is expected to take three years to complete. Meanwhile, the DoR plans to build necessary infrastructure on the damaged section so that the road is operable even during monsoon rains. 

The road section from Chowkidanada in Namo Buddha to Kaladhunga in Roshi Rural Municipality is among the worst damaged. With roads completely wiped away in different sections, the DoR has constructed diversions through the river to allow movement of vehicles. Since these diversions will be of no use during monsoon, the DoR is planning to build necessary infrastructure to make the road operable throughout the year.

The DPR prepared by the Division Road Office in Bhaktapur under the DoR states that three types of walls—RCC retaining, plum and gabion—will have to be built along the road section. Additionally, the 32-km road will be expanded to two lanes. DoR has also incorporated flood damage mitigation methods into the design.

The highway constructed with assistance from the government of Japan spans 160 km and connects Kathmandu to the central Tarai and Koshi Province. Since the highway had a width of more than one lane but less than two lanes, it was creating difficulty for two-way traffic. The DoR has now proposed widening the road to two lanes (nine meters wide) to facilitate smooth flow of traffic in both directions.

Since the highway runs alongside riverbanks, the reconstruction plan also includes scour depth protection measures to prevent river erosion beneath the road surface. This, however, is not the first time that the government considered upgrading the highway into two lanes. The government earlier conducted a study to upgrade the highway into two lanes and even sought the opinion of the Japanese government for the same. However,  the plan failed to take off due to the Covid-19 pandemic. The highway project, which began in 1996 and was completed in 2015 with Japanese assistance totaling nearly Rs 20bn, is one of Nepal's most expensive infrastructure projects. The highway links Dhulikhel on the Araniko highway with Bardibas on the East-West highway.