The 3D graphic on the right shows a structure in the form of a rectangular prism - Leaving Cert DCG - Question B-2 - 2014

Incorporate the tunnel plan with two parallel lines representing the motorway. Ensure these lines intersect the trapezoid drawn previously to show the cut through the structure.

From the front view, depict the outline of the prism, which will be 75mm tall on the left side. Include the top edges and vertical lines to connect the base with the top corners accurately.

For the complete elevation, add the temporary effects of the tunnel on the structure. This would mean indicating the height reduction where the tunnel passes through. The trapezoidal shape should match with the previously drawn plan.

Project vertical lines from the left-hand side of the plan to the elevation, ensuring accuracy in alignment throughout.

Identify and mark the projected points on the left-hand side elevation, connecting them appropriately.

Repeat the projection process for the right-hand side elevation using the points derived from the plan and completing the respective shapes.

Transfer the width from the plan, ensuring the dimensions are carefully reflected in the end view. Use parallel lines for accuracy, setting the outline for the prism based on heights projected from the elevation.

From the elevation, project the heights down to the end view. This will help create a clear representation of the structure's dimensions as viewed from the end.

Finalize the end view by placing the right angles based on the previously projected points. Ensure that the contour of the tunnel is present, following along with the outlined shapes.

Carefully refine the end view ensuring every detail matches with the elevation and plan for coherence in representation.