Thesis treats selection of optimal alignment between a motorway A1 section Postojna – Razdrto and Pivka with connection on foreseen traffic connection Divača – Jelšane. A space, alignments are put into, is remarkably wealthy from environmental aspect. We must dedicate special attention to environmental conditions at placing the traffic route into a place. At the same time should road satisfy all traffic and traffic-safety criteria and also investment value is important among selection of optimal
alignment.
Existent circumstances and preliminary outline studies are introduced in initial assembly of a dissertation in frame Adriatic – Ionic traffic axis. Of these was a lot of them in 70’s in SFR of Yugoslavia (among others also company PNZ), in 90’s has on Faculty of Civil and Geodetic Engineering (Juvanc Ph. D., Pogačnik) emerged version »Y«, that is base for variants in further studies. Company PNG has made preliminary study within last decade (2001) and technical verification (2007). Company of PNZ is working on
preliminary studies and choice of corridor since 2011.
In resumption of a thesis it focuses on engineering of alignment from a motorway A1 between Postojna and Razdrto to a future Adriatic – Ionian motorway. Existig circumstances, traffic loads and environmental conditions are analyzed. Three of them are chosen from among nine alignments, which are more in detail compared among themself on more criteria.
As optimal proved alignment between existing junction Postojna and connection on motorway Divača-Jelšane at Kal west from Pivka.
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