Can brakes be tested while the brake test area is icy?

Testing brakes on icy surfaces is not advisable because icy conditions significantly impair traction and may lead to inaccurate test results or dangerous situations. Proper brake tests require a safe environment where traction is reliable, ensuring that the brakes can be assessed accurately for their stopping power. If brakes are tested on an icy surface, the vehicle may not respond as it would under normal driving conditions, giving a false indication of the brake's performance. Therefore, the guidelines specify that brake testing should only occur in conditions where the surface provides adequate grip, allowing for a precise and safe evaluation of braking effectiveness.