The Delineator is a kind of traffic safety facility with reverse
reflection function, which is set along the edge of the road, used
to display the boundary contours of the road, guide the normal
running of the vehicle, and has the reversed-reflection function.
The Delineator is a line of sight inducing facility. According to
the different setting conditions, it can be divided into two types:
independent contour standard and attached contour standard. When
there is no roadside structure, the outline is marked as a column,
which is composed of a column body and a reverse reflection body.
It is independently set in the shoulder of the roadside dirt road,
and its main structure is a triangular column with cross section.
When there is a roadside structure, the outline is labeled as
adherent type, which is composed of reverse reflector, bracket and
connector. Depending on the structure, the outline can be attached
to the wave beam guardrail, concrete guardrail, tunnel side wall
and cable guardrail. Although contour marks occupy a small
proportion in traffic safety facilities, their role cannot be
ignored. Especially on the expressway and the first class highway,
the vehicle running speed is fast, and the vehicle in the process
of driving at night, the visual distance is shorter, so will
greatly reduce the safety of driving, so in order to achieve the
purpose of safe driving, the road in front of the linear indication
is very important. It is one of the effective means to set contour
markers continuously. Contour markers can make drivers know the
road condition ahead of time through the reflection of car lights.
The outline signs set on both sides of the road serve as warning
signs for the boundary of the road and can also play a role of
inducing and warning drivers at night, which ensures the safety of
passing vehicles.