Application handbook of specifications for drainage design of highway Explanation handbook of specifications for design of highway subgrades Application handbook of technical specifications of maintenance for highway Explanation handbook of specification of seismic design for highway engineering Application handbook of specifications for highway construction supervision Application handbook of technical specification for construction of highway subgrades Application handbook of technical guidelines for construction of highway roadbases Textbook of hydrological specifications for survey and design of highway engineering Application handbook of technical specification for construction of highway cement concrete pavements