What describes the operation of two scrapers working together for highway excavation?

The operation of two scrapers working together for highway excavation is best described as "Push Pull." In this method, one scraper pushes the other, which is designed to pull material. The two machines work in tandem to maximize efficiency and productivity during excavation tasks. The leading scraper (the push scraper) engages the material, and through its action, it facilitates the loading of the trailing scraper (the pull scraper). This dynamic allows for the continuous movement and transport of material, significantly speeding up the excavation process compared to independent or sequential operations.

In contrast to methods like independent loading, where machines operate without coordinating with each other, or sequential loading, where operations occur one after the other, the push-pull method optimizes the use of both scrapers simultaneously. This coordinated effort contributes to smoother workflow and more effective excavation results, making it a preferred practice in highway construction.