Correct inflation pressure controls tire flex to attain and maintain the optimal heat range for the greatest durability and performance over a wide range of conditions. This is important because traction quality and quantity is also constantly changing with variations in the road surface. Roads with a coarse texture offer more dimples and voids for the rubber to squeeze into, whereas very smooth surfaces, such as a steel construction plate, have very little roughness for tires to grip. Moisture and debris affects surfaces differently too. Wet pavement, for example, has reduced traction, but there is usually enough grip provided you brake, turn, and accelerate smoothly. Gravel or sand typically requires much more care.