 However the publication of the National Infrastructure Priority report 'Mobilité 21' in June 2013 has now pushed the completion of the western section back to beyond 2021 and possibly beyond 2030 as it is relegated to a low (2nd class) priority national infrastructure project (along with another €80 billion of road rail and river/port projects) and behind some €30 billion of high-priority (1st class) projects that are likely to be all that is constructed between 2017 and 2030 in France under currently projected budgetary constraints.The south eastern portion of the Francilienne, the N104 between the A4 and A6, is severely congested and carries a high percentage of heavy goods vehicle (HGV) traffic.Some parts of the N104 are being upgraded to three lanes each way in the vicinity of the A4 .