What role do geosynthetics serve in highway construction?

Answer: C — For soil stabilization, drainage, and reinforcing structures

Geosynthetics play a vital role in highway construction by contributing to soil stabilization, effective drainage, and the reinforcement of various structures. They are materials made from polymeric substances that are used to improve the engineering properties of soils. Soil stabilization is crucial in highway construction as it helps in maintaining the integrity and load-bearing capacity of the road foundation, especially in areas with poor soil conditions. By using geosynthetics, engineers can prevent erosion and reduce the risk of settlement, which leads to longer-lasting roadways. The drainage capabilities of geosynthetics enhance the management of water within the roadway structure. Proper drainage is essential to prevent water accumulation, which can weaken the road base and lead to pavement failure. Additionally, geosynthetics can reinforce structures, providing the necessary support to stabilize slopes and embankments. This reinforcement helps reduce the likelihood of landslides and ensures that structures can withstand the pressures exerted by vehicular traffic and environmental factors. The other choices do not accurately reflect the functional applications of geosynthetics in highway construction. They do not serve decorative purposes, nor do they primarily influence traffic speed or relate to the installation of road signs. Instead, their primary benefits lie in enhancing road durability and performance through soil