Legal responsibility for public roads is vested in local authorities, who in discharging their roads functions are referred to as 'Road Authorities'. Councils/Road Authorities must operate in accordance with Roads and Road Traffic legislation. The statutory duty of a Road Authority includes the specification, construction and maintenance of road signs and markings, including in this instance, where to apply double yellow lines and traffic bollards. Overall responsibility for the planning and supervision of works, including signposting on the national road network rests with Transport Infrastructure Ireland.
Road Authorities may make bye-laws relating to where vehicles may or may not be parked and are responsible for the application of single or double yellow lines delineating non-parking areas set out in local bye-laws, as well as for the installation of traffic bollards. Detailed guidance on the application of such regulatory road markings and the specification of standards for traffic bollard construction is set out in my Department's recently updated Traffic Signs Manual and is available to all Road Authorities.