Safe Traffic System (STS) is a child passenger safety company founded by Hoon Y. Kim in Franklin Park, Illinois, in 2000. The company was established to address risks such as incorrect car seat installation and children traveling unrestrained. In 2004, STS introduced the first generation of its RideSafer® Travel Vest, a wearable car seat designed to offer a portable alternative to bulky booster seats while providing a high level of safety.

RideSafer products are lightweight and easy to carry, making them suited to travel, carpooling, and situations where a vehicle or pickup arrangement changes. The vest is safety-certified and meets or exceeds FMVSS 213 requirements. STS offers several sizes and color options, including extra-small, small, large, and extra-large models. The company also provides customer support resources such as product registration, instructional videos, manual downloads, warranty information, FAQs, and purchasing guidance. Through its products and services, Safe Traffic System focuses on practical child-restraint solutions for families on the move.