Apart from link-type tire chains, Alternative Traction Devices include metal cable chains, plastic or vinyl hub cap anchored devices, and other synthetic materials like AutoSocks. It’s important to refer to your vehicle’s manufacturer guide for guidance on chain/traction sizing and specifications. Caltrans and California Highway Patrol reserve the right to prohibit any vehicle from entering a chain control area if it’s determined that traction devices do not meet CVC, Section 605 requirements.