Road characteristics database-WKD / Middle verge width
Description
The road attribute database is a collection of databases each with a relevant road attribute
which can be linked to the national road register (NWB). This can be road characteristics
are such as, for example, the maximum speed, the width of the road or the presence of entries.
A separate file is available for each of these road characteristics.
This road characteristics database records the width of the central reservation. This width
of the central reservation is determined for road safety. The narrower the central reservation, the
It is easier to get a vehicle on the wrong side of the road, with all the consequences that this entails.
In addition, it is also important to make an inventory of whether other obstacles in the central reservation
are present, such as guide rails, ditches or other objects that can prevent
Vehicles can get on the wrong side of the road.
The width of the central reservation is determined on roads with separate lanes. In addition,
is always determined on the left side of the paving surface what the width of the central reservation
is. This is done to prevent the width of the outer verges from being determined as well.
For separate carriageways, in fact, the width of the central reservation is determined twice. The one
time for the outward direction and the other time for the return direction.
The width of the central reservation is determined for roads with a maximum speed of 70 km/h
and higher. The guide rails in the central verges are also mapped. When the
central reservation contains a guide rail, then the width of the central reservation for that part of the
path not mapped and displayed in this WKD file.
For the detection of the guide rail and central reservation, it must first be clear what is meant
under the central reservation. In the NWB, the one-way roads have been digitised in the direction of travel. The
central reservation is the part to the left of a road section until another road section is hit minus
the section with asphalt (the roadway). For the detection of the guide rail and mid-bar width
Therefore, only the left side of the road section is looked at. First, it is examined whether there is a
guide rail is present in the central reservation. If this is present, then a possible
mid-bar width no longer fixed. From a road safety point of view, this road section is already
‘safe’ due to the presence of the guide rail.
Resources
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Tags
- wegkenmerken
- wkd
- wegen
- middenbermbreedte