What technique is often utilized to reduce the risk of landslides on highways?

Utilizing proper drainage systems and slope stabilization is a crucial technique in reducing the risk of landslides on highways. Effective drainage systems prevent water accumulation in soil, which can weaken its structure and increase the likelihood of landslides. By directing water away from slopes through ditches, culverts, and drains, the stability of the soil is enhanced, reducing the risk of failure.

Furthermore, slope stabilization methods, such as retaining walls, rock bolts, and terracing, help reinforce the earth, making it less susceptible to erosion and collapse. These practices are essential in maintaining the integrity of highway infrastructure, especially in areas prone to landslides due to topography or climatic conditions.

In contrast, increased signage may raise awareness but does not prevent landslides. Regular inspections, while important for safety, should be conducted year-round to ensure timely maintenance and risk assessment rather than limited to summer. Cutting down vegetation can actually exacerbate soil erosion, as vegetation helps to bind the soil and absorb water, making it an ineffective method for landslide prevention.