what places does the route connect?
It connects Croatian and Slovenian Adriatic coastal areas in the vicinity of the city of Rijeka, Istria and Slovenian Littoral.
European route E751
The long E751, part of the International E-road network, connects Croatian and Slovenian Adriatic coastal areas in the vicinity of the city of Rijeka, Istria and Slovenian Littoral. 
what is european route e751 ? It isdefined by the Declaration on the Construction of Main International Traffic Arteries of 1975. where is it located? Rijeka, Croatia can you please describe the route? It consists of motorways, but considerable sections are either expressways or two-lane roads with at-grade intersections. can you name any person or organization who helped in its development? UNANSWERABLE
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European route E751 [SEP] Route description
The long E751, part of the International E-road network, connects Croatian and Slovenian Adriatic coastal areas in the vicinity of the city of Rijeka, Istria and Slovenian Littoral. This European route is a Class B branch road, consisting mostly of motorways and expressways along with two-lane roads that have at-grade intersections. It diverges from European route E61 at the Matulji interchange of the Croatian A7 and the A8 motorways, and follows the A8 motorway route. Since sections of the A8 east of Rogovići interchange are still incomplete and lack the second carriageway, those comprise two-lane, limited access roads with grade-separated interchanges (except the Opatija junction) with the D8 state road and is at-grade and regulated by traffic lights.