Which sheets exclusively contain index numbers?

The option that exclusively contains index numbers is related to roadway and traffic design standards. Design standards function as a reference point within engineering plans, providing crucial details regarding materials, dimensions, and construction methods. Index numbers within these documents are utilized to categorize and specify the various design standards, making it easier for engineers and contractors to locate particular guidelines and ensure compliance with the regulatory framework established for roadway construction.

These index numbers play a pivotal role in the efficient navigation of project documentation, allowing users to cross-reference applicable standards as needed. In contrast, the other sheets listed often contain a mix of information, including design graphics, specifications, or survey data, rather than solely focusing on indexing. Thus, the unique function of roadway and traffic design standards as a centralized reference makes this option the correct choice in this context.