Shall the ITIS publish reports also about closings on lower category roads and local roads?

Yes, the system shall publish closings and general use limitation of all categories of roads. The completeness of information depends on the quality of work of the staff of all the Czech road administration authorities as well as on the course of the gradual implementation of the Central Register of Closings system. There are more than 600 such offices that employ more than 2,500 employees. The entire process, regarding its scope, shall take several months and the complex implementation shall take place especially during wintertime when relatively fewer closings are authorized.

Who enters the road practicability information to the system in wintertime?

Road practicability information in wintertime is entered to the system by the dispatchers of the road administration bodies that provide the winter road maintenance (motorway management and maintenance centres, road management and maintenance centres, municipal technical services, etc.) in the given area. The dispatchers are obliged to report the current situation upon any change of the weather or road practicability conditions and also regularly 4 times a day at standard times (3:00-5:00 a.m., 7:00-9:00 a.m., 2:00-4:00 p.m., and 6:00-8:00 p.m.).

What is your source of weather information, especially in wintertime?

Weather information in wintertime is entered to the system by the dispatchers of the road administration bodies that provide the winter road maintenance in the given area (similarly to the information of road practicability).

Throughout the year, a thorough meteorological service of the Czech Hydrometeorological Institute is available for the road management and maintenance, as well as the regularly updated data from approx. 300 automatic road meteorological units. All meteorology information is integrated in the Integrated Road Meteorological Information System, and some of the outputs of the units are also published on the Czech Traffic Portal.

Why is the information of the meteorology units not shown?

The information from the automatic meteorology units along the roads is displayed only in case that the measured values are evaluated as conditions adverse for road traffic. This especially concerns precipitation, strong wind, fogs, and black ice. The information is evaluated and updated every 5 to 6 minutes. Data from approx. 300 road meteorological units all over the Czech Republic is available.

Why is a newly open section of a road not immediately shown in the map?

Map updating takes place jointly for all bodies, organizations, and institutions providing data for the ITIS. As it is not a simple process, both in terms of technology and organization, the updates take place in preplanned terms 2 to 3 times per year. For the most important new motorway sections, we try to adjust the update term to the term of the opening.

What are the rules of searching for a route and the traffic incidents on it?

The route is searched with regard to the user-set parameters. The search form of the current traffic situation map allows selecting the shortest or fastest route; the search may also consider total closings or paid road sections.

The line of the found route may be easily dragged by left-clicking and dropped to another road. This will lead to the recalculation of the itinerary, incident list, or diagram.

Why is it impossible to search for such terms as street names?

The finest search resolution presently ends on the level of municipalities or specific highways or roads. Presently, it is impossible to use street names or house numbers of specific address points.

Why is the severity of a car accident 1 and a 200 m long impassable section severity is 2? Should an accident not always be of the highest severity, i.e. 3?

The level of severity of an incident is not directly tied to a certain traffic incident type, it depends especially on the assessment of its traffic impact. The degree of severity may change according to the current development at the scene as well as during gradual information updating. As the information comes to the ITIS from several thousand members of staff of various bodies and organizations, it is impossible to unify this evaluation parameter absolutely, when it depends on the human factor. The severity should be understood rather as an auxiliary criterion.

I would like to know whether the current traffic information page is updated automatically, e.g. following a change in the situation (accident, weather), or whether I have to "refresh" the page.

The incidents displayed in the map update upon any user activity or selection (display type change, scale change, etc.). As standard, the displayed content is renewed approx. every 2 minutes, depending on the current loading of the servers.

Why aren't some incidents reported on the www.dopravniinfo.cz website?

The respective body, organization or institution has not informed us.

Together with the Czech Police, Fire and Rescue Service, Regional Emergency Medical Service, road administration bodies, road administration authorities, Czech Hydrometeorological Institute, Municipal Police, and other bodies, organizations, or institutions, we are doing the maximum to make such situations exceptional and sporadic.

However, given the nature of the matter, it is impossible to prevent cases of omitting an incident absolutely. It is not humanly possible to keep driving around the entire road network, checking all phenomena and incidents that may limit the road network passability or practicability.

The only ultimately reliable, continuous, and constant control measure is you, the drivers. We want to cooperate with you in creating the web content as this cooperation is the only way of performing overall control leading to the best possible quality of services provided for you. We are creating a team of voluntary traffic reporters; if you want to contribute actively to the building of this web, you can register.

The ITIS is constantly growing and developing; more and more information comes from more bodies, organizations or institutions or from other intelligent traffic systems.