What was NEMA's first set of traffic standards known as?

NEMA's first set of traffic standards was known as TS-1. This standard was developed to establish a uniform guideline for traffic control devices and systems, ensuring consistency and reliability in their implementation. TS-1 aimed to enhance the safety and efficiency of traffic management across different jurisdictions, making it a foundational component in the evolution of traffic technology.

The focus on a specific designation such as "TS-1" in the context of traffic standards reflects NEMA's systematic approach to establishing a clear and organized framework for various traffic control components. Other options, while related to traffic management, do not represent the initial standard created by NEMA, making TS-1 the correct identification of their pioneering work in this field.