Measures for maintaining the functions of Special Pavement(Drainage/Permeability) It means colored asphalt compound pavement (called penetration Hot Mixed Asphalt) with openings inside, which is used for such roads as bicycle road in Plazas, sidewalks in parking lots. Rain water is permeated through the pavement into underground. advantage 1.Elimination of Hydroplaning : safty of traffic 2.Reduction of traffic noise : supplementing noise insulation wall/resolution of civil appeals ( 50%-80% decrease) 3.Increase in durability and more comfortable driving 4.Recycling of junk tires considerations 1.Clearing and maintenance of openings of pavement 2.Apply guideline for drainage treatment application Industrial Road, Highway, Residential area (accident-stricken slippery area/ areas where civil appeal concerning noise is filed from.) Regular clearing is required to maintain drainage capability and penetration and prevent cloggings of openings(Having introduced without clearing system of openings) A wide range of pavement has been neglected with its openings not cleared and, as a result, lost its functions. Clearing of openings is indispensable for water storage and protection of underground ecological system. Permeable pavement Seoul had introduced it as part of detering violent demonstrations (stone-throwing) around universities since 1987. Afterwards, the advantage of the pavement received attention. In 1999, it was applied to pavement of Yoido Park and sidewalk repair projects, bicycle road constructions and other projects. drainage pavement Advanced pavement taking into account comfortable driving conditions(reduced noise) and safe driving on rainy road.( Since the Ministry of Construction and Transportation selected the construction method, this method has been used throughout the country. Maintenance of function: Made vacuum clearing machines Plan 1 Introduction of foreign-made vacuum clearing machines and then sasphaltt localization of the machines Plan 2 Outsourcing to civilian cleaning service companies: After conducting cost accounting, make contract with a certain unit price per a square M (500 yen in Japan) Issuance of guidelines for maintenance of the existing penetration pavement and future     drainage pavement (Maintenance of initial penetration) Japanese provision : 1*10-2cm/sec(400cc permeated within 15 seconds) Evaluate penetration after clearing Quality Guarantee Strict specifications should be applied to production, construction and maintenance. Issuance of instructions on drainage pavement zone The method shall be applied to noise insulation zone, slipping prevention pavement     zone and dangerous zone stricken with accidents caused by slippery rainy road. Begin with building the pavement in the areas where civil appeals come from on     environmental problems and frequent traffic accidents. Issuance of maintenance guidelines on clearing of openings : 1*10-2cm/sec and     above required to be maintained. Plan 1 Appropriate budget for equipment for functional maintenance : (transfer the budget for the existing slipping prevention pavement to this type of pavement Plan 2 Outsourcing to civilian companies : Make contract of unit price after conducting cost accounting for the companies possessing equipment : allocate the budget for maintenance cost ( transfer the budget for slipping prevention pavement to this type of pavement)