In this article we will shortly explain the starting point for the creation of the register of unclassified roads, as well as the overview of the content and the methodology of its design done by the company 4D-monitoring.

The units of local authorities manage, build and maintain unclassified roads. Pursuant to Article 131, paragraph 1, of the Roads Act (Official Gazette 84/11, 18/13, 22/13, 54/13, 148/13, 92/14) it is necessary to record all roads which, on the day this Act was put into effect, were used for vehicle traffic of any kind and which were accessible to a larger number of users, and which are not classified as public roads as defined by this Act, i.e. the ones that have become unclassified.

When the aforementioned laws were enacted, the majority of local authority units had old registers (mostly from 1996), but from the time when the registers where created, up to today, significant changes were made in the development of the network of unclassified roads. When making the first step in the creation of registers, it is necessary to carry out an insight and analysis of the existing data that the local authority unit has in its possession.

Organization of Data Collection

For creating the register, a preliminary inspection of all routes is carried out, and a spherical (360°) georeferenced photo documentation is created. To establish if the conditions on the roads are acceptable for the roads’ recording, an assessment on the field is performed. Field roads’ recording, i.e. positioning of the axis of the roads on the geocoded bases is performed from the measuring vehicle. Recording equipment consists of a computer with installed software that is needed for georeferenced spherical recording and GIS, cameras for making spherical video, GPS devices, and orthophoto underlay of the recorded area.

While creating the register, the field recording is carried out in two stages. In the first stage, road capturing is carried out, as well as roads recording which is carried out on the orthophoto underlay in GIS. The next step is to have a coordination meeting with the representatives of the public local authority in order to establish deviations and give guidelines and recommendations for completing the records. In the second stage, a detailed verification of previously entered data is done, and new roads and data are entered based on conclusions from the coordination meeting. Georeferenced spherical photos taken during field recording are put into relationship with register’s GIS database.

Georeferenced spherical photo-documentation within the QGIS interface

 

Data that we collect and input in the database are the following:

No.	Data	Allowed Values
1.	Road Mark	Mark
2.	Type of road based on the use	Main local roads Main collector roads Residential roads Rural roads Other roads for motor vehicle traffic Driveways Roads with restricted traffic
3.	Name of the road	Name of the road
4.	Pavement types	Asphalt Concrete Paving stones Macadam
5.	Length	[m]
6.	Surface area	[m2]
7.	Affiliation to the town	(Name of the town)
8.	Affiliation to the cadastral municipality	(Name of the cadastral municipality)
9.	Date of data collection	dd.mm.yyyy

Based upon client’s request, we can also collect data regarding guard rails, horizontal and vertical traffic signalization and pavement condition.

Processing and data entry in the database, and documentation creation

Before entering data in the database and creating the documentation, data collected on the field first need to be verified and validated. Using data collected on the field, vector data, data from raster basis and georeferenced spherical photo-documentation, all these should be entered in GIS database, and a  “Register of unclassified roads” study is being created.

Integral part of the register:

• General technical description;
• Spreadsheet of unclassified roads;
• Graphics with roads’ axes drawn on the survey map;
• Delivered database in GIS;
• Georeferenced photo-documentation connected with GIS.

References