Complex sentence: Stone mastic asphalt was developed in Germany in the 1960's, Stone Mastic Asphalt (SMA) provides a deformation resistant, durable surfacing material, suitable for heavily trafficked roads.
Split into simpler sentences: Stone mastic asphalt (SMA) was developed in Germany in the 1960s. It provides a deformation resistant, durable surfacing material, suitable for heavily trafficked roads.