What type of vest is required to be worn during TDR?

The correct choice is Class 2 vest. This type of vest is specifically designed for environments where there is a need for increased visibility due to the presence of vehicular traffic or other hazards. A Class 2 vest provides a higher level of visibility than a Class 1 vest, making it suitable for less intense traffic situations where workers need to be easily seen, but it does not require the full reflective features of a Class 3 vest.

Class 2 vests are typically used in settings like highways where there may be moving vehicles, ensuring that the wearer is visible from a distance to provide safety in various work environments. They often include reflective stripes and are usually worn in conjunction with other safety gear to promote overall worker safety.

Understanding the context of the situation is crucial. The other options either provide insufficient visibility for the required environment (like Class 1) or are not applicable altogether (like having no vest). Class 3 vests, while very effective, are generally reserved for high-speed traffic conditions where extreme visibility is paramount, making Class 2 the ideal choice for TDR situations.