Emergency access routes. Specifications of Temprorary Trackway Road Mat: 1.Material: PE / HDPE / UHMWPE. 2.Standard sizes: 1220mm x 1220mm (4′ x 4′); 1220mm x 2440mm (4′ x 8′) 3.Various sizes and thickness can be offered to suit your need. Detailed Images. Applications of temporary HDPE access road mat : 1.Construction, 2. Civil