The research objective is to study the influence of thedriver's experience on the efficiency of the textual traffic sign dependingon the visibility, that is on the weather conditions. Theresearch was canied out by simulating traffic situation for twodifferent visibility conditions (good and poor) on represmtativesample of drivers regardi11g their d1iving expe1ience.The research results indicate high dependency of traffic signefficiency on the driver's experience. The textual traffic sign efficiencyis substantially lower in motorists with several years ofd1iving experience and the experienced motorists than thosewith less experience and extremely experienced mot01ists, whichis explained by motorist 's evaluatio11 of the traffic sign significance.According to experimental results, less than 65% of driversin low visibility conditions registered the number of words onthe traffic sign, and less than 50% the precise content, thusleading to a conclusion that the traffic sign does not satisfy itsfunction in this situation.

The paper analyses the main factors of traffic safety andreliabilityat level crossings. The number and causes of accidentsare stated, that result from ignorance, insufficient training ofthe traffic participants, their ilnsponsibility and insufficient orincomplete legislation, as well as from insufficiently professionaland scientifically not serious enough approach to solvingthis cardinal problem in road and railway traffic. Based on theanalysis the causes are determined and solutions proposed, aswell as more efficient methods to improve safety and reduce thenumber of traffic accidents at level crossings.

Operation efficiency of mountain resort systems dependslargely on harmonious operation of the most important andtherefore most influential elements of ropeway transp01tationand tourist subsystems. Within the framework of a tourist subsystem,the extent and quality of tourist offer for long-stayingguests plays an essential role. Harm.onised development of theabove-mentioned elements ensures major utilisation and bettereconomic management of the entire system so that it may offerquality se1vices. First of all, the system enables permanent andenvironmentally friendly development of the systems that are asa rule in an absolutely sensitive alpine region.The article deals with some results of in-depth research onthe ropeway transportation system and the results of know-howtransfer into the actual environment of the Slovene mountainresorts.

The critical axial load of the marine line shafting is obtainedby using simplified mechanical models of two span barswith various supporting modes, loaded with constant compressiveforce. The values of critical forces plotted as functions ofthe ratios of span lengths, for several ratios of span flexuralJigidities,are shown in diagrams.

The concept of operation quality control using the P cardhas proven successful in some other companies, and it had notbeen previously used in the postal traffic. In this concrete study,the statistical data have been gathered on the number of sentand received post according to types and months for the periodbetween Janua~y and December 1998 in domestic and internationaltraffic for Sredi.Ste pasta Zagreb (Zagreb Post OfficesCentre) and in international traffic for Hrvatska pasta (CroatianPost), as well as the number of claim forms and the numberof paid compensations for missing letters ..Based on these, the first step towards operative analysis hasbeen made and the initial knowledge has been acquired. IIshows that the control card can be combined with a number ofotherprocedures that will provide a clear ove1view of the qualityaccording to the given crite1ion (in the concrete case the qualityindicator is the number of claim forms).

In recent years, several computer models have been developedto help traffic engineers understand and solve traffic problems.Although traffic enginee1ing studies continue to be carriedout by manual methods, computer approaches are beingincreasingly employed for traffic engineering analyses and design.Many authors have described the most common computerprograms for signa/timing optimization and traffic simulationflows.The volume of traffic is increasing all the time. It is happeningso fast that the space available for new roads and car parkscannot grow apace enough. That would mean too great a strainon humans and the environment. This paper describes amulti-computer system VRS 2100 with an integral part of collectivetraffic management.

As a subprogram of wider area navigation, the basic areanavigation defines operations within the European airspace inthe ATS route netlvork, and terminal controlled areas, accordingto the developed chronology of gradual implementationand clearly defined authorities regarding its implementation.The introduction of the basic area navigation operations intothe airspace of the European Civil Aviation Conference, has resulteddirectly from a significant growth of traffic density andthe impossibility of control using conventional methods. It willinsure numerous advantages, first of all greater traffic throughputcompared to the previous method of navigation guidance,thereby not disturbing the existing safety standards.

Traffic infrastructure makes an integral pwt of the trafficand economic system in each country. The traffic policy makershave a task, that their policy must be based on scientific developmentsand synchronised activity of all economic systemsegments.