Which method is considered effective for minimizing loss of friction on runways?

Pavement grooving is considered an effective method for minimizing the loss of friction on runways because it involves creating shallow grooves on the surface of the pavement. These grooves enhance the tire-pavement interaction by allowing water to drain away, which helps maintain traction, especially in wet conditions. By channeling water away from the contact area between the tires and the runway, grooving significantly reduces the risk of hydroplaning and improves overall safety for aircraft operations.

The other options, while related to runway surface treatments, do not specifically target the reduction of friction loss in the same manner. Pavement coating could enhance surface durability, but does not specifically address friction. Surface sealing improves protection against weather but may not have a direct impact on traction. Pavement painting is primarily used for markings and does not contribute to enhancing friction on the runway surface. Thus, pavement grooving stands out as the most effective method for this purpose.