When conducting the Walk and Turn test, what is the preferred surface?

The preferred surface for conducting the Walk and Turn test is stable, level, and non-slippery. This is essential because the test aims to objectively evaluate an individual's physical coordination and balance, which can be affected by the surface conditions. A stable and level surface allows for a fair assessment of the subject's performance without additional variables, such as the terrain's unevenness or slipperiness, which could skew the results. By ensuring the surface is non-slippery, the test reduces the risk of unforeseen slips or falls that might prevent an accurate reflection of the person's abilities. This controlled environment enhances the validity of the test results, contributing to a more reliable assessment during a DUI traffic stop.