How many passes are required in LHGG when leveling?

When leveling with a road grader using a technique known as left-hand grading or LHGG, it generally requires two passes to achieve a smooth and even surface. The first pass is typically to create a rough grade, which establishes the initial contour and removes any significant high points from the area. After this initial shaping, the second pass refines the surface, ensuring that the material is evenly distributed and the grade is consistent.

This two-pass approach helps to minimize inconsistencies and allows the operator to make necessary adjustments based on the conditions of the site. The grading operation can be more efficient when it is executed in such a manner, as it facilitates proper drainage and surface preparation for subsequent work, such as paving or further compaction.