What must be used to protect roadway workers if ample time cannot be provided?

Foul Time protection is essential in situations where there is insufficient time to prepare for the potential hazards that roadway workers may face. This type of protection involves setting up safety measures that can be enacted quickly to manage risks from moving trains or vehicles in the vicinity of work zones. It is particularly crucial in environments where operations or activities are unexpected, or where notification of oncoming trains cannot be made in a timely manner.

By using Foul Time protection, workers are given an immediate form of alertness concerning safe conditions around them, which may include the employment of warning systems that can protect them before they become exposed to hazards. This is particularly relevant in maintaining safety protocols, as roadway workers must always adhere to specified protective measures when sharing work areas with trains.

The other options, while potentially useful in specific situations, either do not address the urgency or the immediate need for protection or are not sufficient on their own as a primary method of safeguarding workers in a time-constrained environment.