Technical specifications for application of pebble concrete to highway bridges and culverts Technical specifications for construction of highway bridges and culverts General specifications for design of highway bridges and culverts Specifications for design of foundation of highway bridges and culverts Technical specifications for utilization of construction waste in highway engineering Technical specification for application of autoclaved aerated concrete Technical specification for application of architectural glass Technical specification for maintenance of sea-crossing highway bridges Technical specifications for field inspection of existing highway bridges Technical specifications for preventive maintenance of highway asphalt pavement