Design Criteria for Road Construction Based on Topographical Survey Data

From the given data, the design specifications for a single-lane carriageway road with an approximate length between 1.8 - 2.0 km can be summarized as: 1. Design Speed: The road should be designed for a speed of 50 km/h. This is the speed that vehicles are expected to safely travel at, under favorable road and traffic conditions. 2. Geometry: The road should consist of a single lane with a width of 2.5m. The road camber, which is the cross slope provided to raise middle of the road for drainage of rain water, should be 2.5% left and right. 3. Kerb Data Type: The chosen kerb for this design would be MK4. The design will need to accommodate this type around the margins of the road. 4. Shoulder: The road design should include a shoulder that is 1.5m wide with a slope of +4%. The shoulder serves as a safety zone for broken-down vehicles and also supports the pavement structure. 5. Side Slopes: The measurements for cut and fill slope ratio should be 1:1 and 1:1.5 respectively. Cut slopes are created when an area is excavated, and fill slopes are created on the edge of embankments, where soil is placed. 6. Trapezoidal Drain Specifications: To facilitate drainage, necessary trapezoidal slope designs are needed with measurements for slope and width, respectively, as - slope 1 (1:1, 0.40m), slope 2 (1:100, 0.20m), slope 3 (1:1, 0.4m). 7. Layer Works Specifications: The design needs to stipulate for three different layers with their respective widths and thicknesses. The top layer should have a width of 2.5m and a thickness of 0.04m. The second layer should be 2.6m wide with a thickness of 0.10m. The third layer should have a width of 2.7m and a thickness of 0.14m. 8. Road Reserve: The available space for the road should be a minimum of 15m in width with a compaction factor of 0.90. These specifications could be subject to change if site conditions render them unsuitable. If such changes are made, they must be within a reasonable scope and justified in the final design report. Ensure that you download the relevant data from the shared Moodle path and import it into your modeling software so you can follow these specifications. This should include survey data, topographic coverage, road features, and services. The survey data will likely be very important for the road layout in the road design software. Once the data has been imported and analyzed, the road profile can be created according to the specifications outlined above. This will include modeling the lanes, shoulders, drains, kerbs, and embankments, as well as any other necessary features. Be sure to adjust your design specifications as needed to resolve any discrepancies and complete a safe and efficient design.