What is one benefit of using aerial surveys in highway planning?

The choice highlighting the benefit of using aerial surveys in highway planning emphasizes their ability to provide detailed topographic information quickly and accurately. Aerial surveys utilize advanced technology such as drones or aircraft equipped with high-resolution cameras and sensors to capture extensive geographical data over large areas. This method is particularly beneficial in highway planning as it allows for a thorough understanding of the terrain, identifying features such as elevations, water bodies, and vegetation.

The accuracy and speed of aerial surveys facilitate the efficient planning and design process. Planners and engineers can analyze the collected data to make informed decisions about the project's layout and any necessary adjustments due to the landscape. This immediate and reliable information reduces the likelihood of unexpected issues arising later in the project, ultimately leading to more effective and cost-efficient planning and execution.

In contrast, while cost estimates for materials, ensuring compliance with zoning laws, or reducing on-site inspections can be components of the overall project management, they are not direct advantages of utilizing aerial surveys. Aerial surveys serve as a foundation for making various logistical and managerial decisions, which can indirectly influence these other areas, but their standout benefit lies in the provision of accurate and timely topographic data essential for successful highway planning.