The aim of the project is to improve the road section on the National Road (E.O.) 3 Kozani-Ptolemaidas from the junction of TEI Kozani to the junction of Melissia-Vateros by creating two level circular nodes and the formation of the road section between them. In particular, the three subsections of the project are the following: The level junction at the entrance of the TEI of Kozani, which is to become circular and is installed at the confluence of E.O.3 with the TEI The level junction that is also to become circular and is installed at the junction of E.O. 3 with the directions towards Vatero and Melissia The line segment of the E.O. 3 approximately 0.4 km. located between the previous two level nodes