Road and bridge designs in the form of notes, drawings, and instructions are included in the ____________.

The correct choice emphasizes that road and bridge designs, detailed through various notes, drawings, and instructions, are typically contained within the contract plans. Contract plans serve as the official documentation for construction projects, specifying how the project should be constructed and ensuring that all necessary guidelines and standards are met.

These plans include detailed engineering drawings that provide information on dimensions, materials, and the specific construction methods to be employed. They lay out the required specifications for the construction process, ensuring consistency and clarity between the designers and the contractors who will execute the work.

In contrast, the other options serve different purposes: permit applications are forms submitted to regulatory agencies for approval before project initiation, project proposals outline the general approach and objectives of a construction project without the technical specifics found in contract plans, and feasibility studies assess the viability of a project but do not contain the detailed design information necessary for actual construction.