2 1.3 main contents of design (1) Highway route design is carried out on 1:2000 topographic map, and the plane, longitudinal section and cross section of the route are designed, the location type of bridge and culvert is selected, and the corresponding drawings, tables, relevant calculations and specifications (the length of the route is not less than 2.0km) are completed. (2) Complete subgrade and pavement design based on route design, subgrade design, drainage, protection and support works and special subgrade design; Pavement engineering design (structural combination design, thickness calculation and scheme comparison of asphalt pavement and cement concrete pavement). (3) Preliminary design of bridges and culverts According to the information provided, complete the selection of standard drawings of bridges and culverts, including relevant drawings, tables, quantities and relevant descriptions. (4) Construction organization design According to the design content, complete the construction organization design and construction drawing budget or budgetary estimate (bridge and culvert), and submit the corresponding calculation and explanation. 1.4 Basic requirements of design (1) According to the requirements of the design project, independently complete the design task, make different design schemes, and hand over the final result diagram. (2) Careful design, accurate calculation, meticulous drawing and accurate and fluent text expression. (3) Establish a scientific attitude, pay attention to research spirit, and cultivate the ability to work independently. (4) Manage the graduation design in strict accordance with the requirements of relevant documents, and strive to improve the quality of graduation design.