1. Categorized by material: They include metal barriers, concrete barriers, wooden barriers, and plastic barriers, etc. Metal barriers are typically made of steel or aluminum, featuring high strength, corrosion resistance, and long service life. Concrete barriers are cast from concrete, offering stable structure and resistance to deformation. Wooden and plastic barriers, respectively, are made from wood and plastic, characterized by easy installation.

2. Categorized by height: They can be divided into low矮围挡 and high矮围挡. Low矮围挡 typically measure around 1 meter in height and are commonly used along roadsides or at small-scale construction sites; high矮围挡, generally over 2 meters tall, are mainly used for large-scale construction projects or roadwork.