In the process of their work Traffic Holding Ltd. and Zebra Ltd. apply European standards of quality, occupational safety, and environmental protection. Our corporate mission and philosophy is to strengthen and expand our development by relying on quality and efficient operations, loyalty to our customers, partners, and employees. Following this philosophy, we have implemented an Integrated Quality, Environmental, and Occupational Health and Safety Management System under the requirements of the international standards BS EN ISO 9001:2008, BS OHSAS 18001:2007 and EN ISO 14001:2004.

Zebra Ltd. is registered in the CENTRAL PROFESSIONAL REGISTER OF CONSTRUCTORS AT THE CHAMBER OF CONSTRUCTORS IN BULGARIA and holds the relevant certificates for the execution of works of transport infrastructure; public works infrastructure, hydraulic engineering, and environmental protection; high construction, its adjacent infrastructure, electronic communications networks, and facilities, energy infrastructure works.