Line 2 of the Evéole urban network is a structuring public transport line (second busiest line in the network with more than 8,000 passengers per day) that connects Leforest/Auby to the Dechy Hospital Center (CHD). However, today it is confronted with multiple malfunctions (a very large majority of traffic in the middle of car traffic, a variation in travel times that can reach 11 minutes ...) which penalize its regularity and attractiveness, while it serves important structuring polarities and poles of trade of our agglomeration. The objective set by the SMTD is therefore to transform the current line 2 into a future line B of BHNS (High Level Buses). To achieve this objective, various road improvements are planned, in order to give priority to the future line B: redevelopment of strategic crossroads, development of linear clean sites ... Thus, the main features of BHNS’s Line B project are as follows: - 9 municipalities served, - 1.7 km of additional own site in addition to the 4.5 km common trunk with the existing line A; - 10 new crossroads with traffic lights with BUS priority; - 26 new stations (52 platforms) accessible by PMR/UFR; - many connections with other alternative modes of travel to offer our users optimal intermodality.