Technical specification for post-grouting of cast-in-place pile of highway bridges Technical specification for maintenance of sea-crossing highway bridges Technical specifications for field inspection of existing highway bridges Technical specification for corrugated steel-concrete composite bridge deck of highway bridge Technical specification for variable stiffness bearings of highway beam bridge Technical specifications for strengthening of highway tunnel Technical specifications for construction of highway tunnel Technical specification for construction of cement stabilized base Technical specification for construction of highway safety facilities Technical specification for cast-in-situ pile foundations