What is the effect of placing anti-slip friction mats (protuklizne podloge) with a certified friction factor of μ = 0.6 beneath cargo on a truck bed?

1. Significantly increases friction resistance, greatly reducing the number of tie-down lashing straps required to secure the load
2. Increases vehicle fuel consumption by 15%
3. Prevents the trailer suspension from leveling
4. Makes the cargo heavier during axle weighing