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Traffic growth is strongly fuelled by economic growth, because without an efficient transport system the internal market and the globalization of trade cannot fully be exploited. The growth of traffic is affected primarily by two factors, namely in the passenger traffic by the increased use of cars, whereas in freight transport the traffic growth was affected by changes in the economy. The economic growth will lead to increased need for mobility it is estimated that demand will increase by 38% for freight transport services and by 24% for passenger transport (European Commission, 2001).

The paper presents an approach to the problem of railway-road level crossings. The goal is to improve safety in the transport system network, which includes a considerable number of "inadequately protected" crossings. The single crossing, in its abstract sense, is considered to be a system consisting of four subsystems: the external world, the crossing in its strict sense of the word, the railway and the road. The system analysis of the problem is based on an exhaustive set of bibliography, listed at the end of the paper. This analysis leads to many findings and those exerting the greatest impact are selected as the basis for the synthesis. The synthesis proposes a triangle of variables: time period, critical points on the railway network and the value of the risk indicator. This simple model may include also other variables by converting relevant values. The main result is the risk indicator over the network. It can be used for various scenarios, thus enabling their mutual comparison as well as application in investment studies. Članek obravnava problem nivojskih križanj železnice in ceste. Cilj je izboljšati varnost transportnega sistema, ki vključuje precejšnje število nezadovoljivo zavarovanih križanj. Nivojsko križanje sestavljajo štirje manjši deli: okolje, samo križanje, železnica in cesta. Analiza problema je osnovana na izčrpni bibliografiji, ki je navedena na koncu članka. Ugotovitve analize, ki imajo največji vpliv, so bile osnova za končne sklepe. Gre za preplet treh dejavnikov: časa, kritičnih točk na železniški mreži in tveganja. V ta model lahko vključimo tudi ostale dejavnike. Zaključek analize podaja dejavnike največjega tveganja na železnici, ki se lahko uporabijo za različne scenarije, omogočajo njihovo medsebojno primerjavo in se upoštevajo pri investicijskih študijah.

The paper explores the significance of human potentials management in micro and macro transport systems and investigates to what extent do the human potentials represent the factor of growth and development of transport systems. The facts gathered in this paper should represent the quantitative starting points for viewing the specifics of transport service productions and future movements on the transport labour market, and the possibilities of information technologies implementation in transport human potentials management optimizations, all with the aim of producing new and of improving the inherited comparative advantages of the Croatian transport systems. Temeljni cilj ove znanstvene rasprave jest istražiti značenje upravljanja ljudskim potencijalima u mikro i makro prometnim sustavima, odnosno mogu li i u kojoj mjeri ljudski potencijali biti čimbenikom rasta i razvoja prometnih sustava. Dobivene spoznaje u ovoj znanstvenoj raspravi trebaju predstavljati kvalitetna polazišta za sagledavanje specifičnosti proizvodnje prometnih usluga i budućih kretanja na prometnome tržištu rada, te mogućnosti implementacije informacijskih tehnologija u optimalizaciji upravljanja ljudskim potencijalima u prometu, a sve s ciljem proizvođenja novih i oplemenjivanja naslijeđenih komparativnih prednosti hrvatskoga prometnoga sustava.