a) traffic signs including traffic signals, road signs and markings; b) rules of the road; c) speed limits appropriate to road design; d) driving signals; and e) driving hours. 2. Member States shall develop, adopt and implement a harmonised system of road traffic signs and signals. 3. For the purpose of developing harmonised rules of the road, Member States shall consider accession to the UN Conventions on Road Traffic of 1949 and 1968. ARTICLE 6.12 ROAD TRAFFIC QUALITY MANAGEMENT PLAN 1. Member States shall co-operate to develop and implement a co-ordinated regional road traffic quality management plan to a) improve road traffic safety which contributes to the quality of life of the Region's inhabitants; b) reduce the burden imposed on their economies by traffic related fatalities, injuries suffered by inhabitants and damage to property; c) improve discipline on the roads; d) protect the road infrastructure and environment against wilful and unnecessary damage; and e) enhance the levels of administrative and economic order on the road network. 2. The plan contemplated in paragraph 1 has to promote collaboration between Member States to a) create, enhance and maintain awareness of road traffic quality issues, inform target groups and change perceptions in this regard amongst the general population through communication; b) develop human resources in road traffic management and traffic control; c) increase and maintain related knowledge and skills through education and training; d) conduct joint research and share research findings, especially in the field of road traffic operations, traffic quality and road and vehicle engineering; e) exchange and transfer technology; f) improve road traffic control and policing and the adjudication of offences; and g) improve road traffic information management and exchange. 3. Member States shall co-ordinate their national and regional efforts to promote traffic quality in order to achieve maximum results. To this end, Member States shall develop