Steel bridge guardrails, also known as bridge guardrails, refer to guardrails installed on bridges to prevent uncontrolled vehicles from crossing the bridge. They have the function of preventing vehicles from breaking through, underpassing, and climbing over bridges, as well as beautifying bridge buildings. Next, we will introduce how to classify the anti-collision level of bridge guardrails. There are many methods to classify bridge crash barriers, in addition to their installation locations, they can also be classified based on structural features, crash performance, and other factors. According to the installation location, it can be divided into bridge side guardrails, bridge central divider guardrails, and guardrails at pedestrian and lane boundaries; According to structural features, it can be divided into beam column (metal and concrete) guardrails, reinforced concrete wall type expanded guardrails, and composite guardrails; According to the anti-collision performance, it can be divided into rigid guardrails, semi-rigid guardrails, and flexible guardrails.

The common forms of bridge guardrails include concrete guardrails, corrugated beam guardrails, and cable guardrails. The selection of the form of bridge guardrails should first be based on the level of the highway, taking into account factors such as safety, coordination, characteristics of the objects to be protected, and site geometric conditions to determine the collision prevention level. Then, the selection of the construction form should be based on factors such as its own structure, economy, construction, and maintenance. There are three burial methods for it: direct embedding of columns, flange connection, and pouring of bridge guardrails and bridge decks into one through force transmitting steel bars. When conditions permit, a replaceable guardrail can be used.