Technical specifications for non-destructive testing of bridge concrete structure Technical specifications for construction of highway bridges and culverts Technical Specifications for Construction of Highway Cement Concrete Pavements Technical specification for steel tube-reinforced concretecolumn structure Technical specifications for construction of highway tunnel Technical Specification for Construction of Highway Cement Concrete Pavements Technical specification fo self-leveling flooring construction Technical specifications for construction of highway gas tunnel Technical specification for construction of highway safety facilities Technical specification for construction of top-down method