Due to the development of Langarud city and the traffic passing through the northern side road, which is estimated to be about 24,500 vehicles a day, the widened road on the southern edge of Langarud city, which has become an urban boulevard, cannot handle the traffic throughout the country, so the construction of a bypass outside the comprehensive plan of the city was necessary. The length of this bypass, which is four- lane, is 11.4 Km and starts from Talesh area in the west Langarud, at mileage 220 of the highway axis and ends before Shalman city.