• 1.200 kmof roads
  • 33.500traffic signs
  • 18.000parking places
  • 4.641pedestrian crossings
  • 275crossroads with traffic lights
  • 2.305traffic lights



Project Name

Development and maintenance of a geospatial information system for road infrastructure management


Ljubljanska parkirišča in tržnice d.o.o.


2009 -

The public company Ljubljanska parkirišča in tržnice (LPT) provides commercial public service of public market and parking facilities management and cleaning, as well as the maintenance of municipal roads, which also includes regular maintenance of traffic signs, the editing of traffic signs and lighting signs and regular maintenance of road equipment – all in the City of Ljubljana.

With the increase in daily migration and the number of inhabitants in Ljubljana, the scope of LPT activities is changing as well, requiring the company to provide, reliably, safely, environmentally and economically efficient performance of utilities and other activities. In order to carry out its activities efficiently and economically, in 2009 LPT decided to develop and establish a geospatial information system since their services are based on spatial data. These, however, must be managed, interpreted and maintained. LPT attracted an LGB contractor to develop tools for managing and maintaining road infrastructure data.

Geospatial data managed by LPT are of the following types and groups:

  • traffic lights: standing places, signal providers, portals, boards, lamps, loops and keys for the blind
  • traffic signs: traffic signs, floor signs, routing boards
  • urban equipment: urban machines, LED displays, bicycles, bicycle counters
  • parking policy: parking places and parking garages, parking areas, parking zones, ATMs, reserved parking spaces for the disabled, moto, electric vehicles, car sharing, taxi, and dedicated reservation, bike racks
  • restricted traffic: pedestrian zones, zones 30, zones of calm traffic, restricted zones, submersible posts, barriers and access controls, cameras and recorders, crossroads and video surveillance of these
  • parking equipment: area, cash registers, access controls, locks, video surveillance, kiosk, busy displays
  • optical infrastructure: fiber optic cables, fiber optic couplings, shafts and tubing, WiFi antennas, WiFi hubs, WiFi coverage

With the collaboration of LPT and LGB companies, a powerful spatial information system was created that provides the client with a range of useful functionalities, namely:

  • simple and effective insight into spatial data stored in a central database
  • managing, editing and graphical displaying of vertical traffic signal data
  • managing, editing and graphically displaying of traffic light data
  • operation of the MOLIS guidance marking system
  • managing, editing and graphically displaying floor markings

A particular advantage of the LPT spatial information system is the functionality for managing and monitoring changes in traffic signaling and floor markings over time. The data model enables the user to have three different displays of traffic signal data and floor markings with respect to time, namely:

  • display the status of the selected date in the past (so-called history cadastre)
  • display of the current (existing) status (the so-called “live” cadastre)
  • a view of the future, as the system also enables the entry of data from spatial plans and future road transport arrangements

The LPT history cadastre allows the LPT to more effectively retrieve information in court and police inquiries for a specific date, e.g. when a car accident occurred, and resolves questions about the status of road signs and floor markings at the selected location.

Updating of road and other infrastructure facilities in Ljubljana and frequent changes in land use also require updating of spatial data records managed by the LPT spatial information system. In order for the records to reflect the true state of nature, regular updating and maintenance of the data are required. To obtain LGB quality spatial data, LPT assists with a variety of mass capture technologies by:

  • geodetic measurements: obtaining spatial data based on the field measurements of classical geodesy and GNSS measurements,
  • remote sensing: obtaining spatial data from satellite, aerial or radar imagery of the earth’s surface
  • photogrammetry: obtaining spatial data based on stereo-pairs of aerial photographs or video recordings of the earth’s surface
  • digitalization of analog data sources: scanning, vectorization
  • combined capture: obtaining spatial data based on field measurement in combination with other data capture technologies
  • other sources: purchase or obtain spatial data from public records or databases of other sources

The LPT spatial information system today contains an optimal database architecture that enables it to grow and adapt to the new needs and demands of modern times.

The cooperation between the LGB and the LPT client continues successfully after the establishment of the spatial information system. The LGB periodically captures and updates spatial data and updates the web, desktop, and mobile application and its connectivity to the client’s business information system.