NEW APPROACH TO DETERMINING VISIBILITY LENGTH ON PASSIVE PROTECTED LEVEL RAILROAD CROSSINGS

摘要

Prí?ujo?i prispevek temelji na vpra?anju, ?e obstoje?a zakonsko doto?ena metoda za dolo?evanje dol?ine pregled-nosti na pasivno za??itenih ?elezni?kih prehodih zagotavlja ustrezni nivo prometne varnosti. Ugotovljeno je, da uporaba obstoje?e metodě ne omogo?a vozniku motornega vozila zaustavitve vozila v vseh pogojih. Na osnovi tak?ne ugotovi-tve je predlagan nov pristop k dolo?evanju dol?ine pregled-nosti na pasivno za??itenih nivojskih ?elezni?kih prehodih. Nov pristop temelji na predpostavki, da je nujno, predvsem na nivojskih ?elezni?kih prehodih lokalnih cest, upo?tevati najslab?e mo?né in pri?akovane cestne in vremenske pogoje. Preizkus predlagane metodě v reálnem prometnem okolju je pokazal, da pri ni?jih hitrosti cestnih vozil skoraj ni razlike, pomembnej?e prednosti se poka?ejo pri hitrostih 30 in 50 km/h, kjer so ugotovljene ve?je dol?ine zaustavl-janja cestnega vozila (cestno vozila se lahko varno zaustavi pred nivojskim ?elezni?kim prehodom) pri skoraj enakih dol?inah preglednega polja. Uporaba predlagane metodě lahko pomembno prispeva k pove?anju prometne varnosti na nivojskih ?elezni?kih prehodih za??itenimi samo z Andre-jevim kri?em.%The paper is based on the question whether the existing (legislation determined) method for determining the visibility length on passive protected level railroad crossings insures the relevant level of traffic safety. It has been recognised that using of such method does not provide stopping of road driver vehicles in front of railroad crossing in all conditions. Based on such conclusion a new approach to determining visibility length on passive protected level railroad crossing is proposed. The new approach is based on the assumption that it is necessary, primarily on level railroad crossings with local roads to recognize the worst possible and expected road and weather conditions. The testing of the proposed method in the real environment has shown that at lower speeds of road vehicles there is almost no difference, and that important benefits are recognised for the speeds of 30 and 50km/h where longer stopping distances of road vehicles have been detected (road vehicle can stop safely in front of a rail crossing) with almost the same visibility lengths. The use of the proposed method could have important impact on the increase of traffic safety on passive protected level railroad crossings.