Technical specifications for design and construction of special road in automotive proving ground Technical specifications for design and construction of highway in permafrost area Technical specifications for design and construction of highway subgrade in loess region Technical specifications for design and construction of highway in seasonal frozen soil region Technical guidelines for design and construction of highway subgrade in saline soil region Specifications for design and construction of asphalt pavement of expressway Specifications for design and construction of highway tunnels with gas Technical guidelines for design and construction of highway retaining walls Technical specifications for construction of highway bridges and culverts Technical specification for retaining and protection of building foundation excavations