In the newly built Markovec Tunnel, we executed the following works: cleaning and removal of agents against evaporation of water from the ground, supply and installation of a prefabricated plastic band/foil for thick-layer permanent longitudinal markings on the road surface, including a preliminary application of a primer for improved grip on a cement concrete surface. Besides the execution of all road markings, we also supplied and installed crash buffers with chemical anchors in the area of lay-bys in the tunnel.