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D23 state road, connects cities and towns of Duga Resa, Josipdol and Senj, to the state road network of Croatia, and most notably to A1 motorway in Žuta Lokva interchange, as well as two major state roads - D3 and D8, located at the northern terminus and the southern terminus of the road respectively. The road is long. The route comprises a significant number of urban intersections, in segments of the road running through Duga Resa and Senj. The D23 state road runs parallel to a section of the A1 motorway between Karlovac and Žuta Lokva interchanges, thus serving as an alternate or backup route for the motorway. Additionally, A7 motorway route is planned along the D23 road between Senj and Žuta Lokva. Once that motorway is completed, the D23 road shall run parallel to either A1 or A7 motorway along its entire length. The road, as well as all other state roads in Croatia, is managed and maintained by Hrvatske ceste, a state-owned company. == History == (詳細はVratnik pass, currently a part of the D23 road, was already in use during Roman time as a salt road,〔 〕 and it became important for timber and other goods in the Middle Ages. However, the first well documented road built along the route was ''Via Josephina'' named after Joseph II, Holy Roman Emperor who commissioned its construction in 1775. Latin inscriptions carved in rock along the original Via Josephina route completed in 1779 testify that the Emperor travelled through the Vratnik pass on horseback when he realized that the route between Senj, as a major fortress on Adriatic coast, and the hinterland was nearly impassable. Legend has it that this happened when he fell from his horse near Vratnik Pass. Even though the incident is impossible to verify, the town of Josipdol to the east of the mountain pass is named after the Holy Roman Emperor. In 1775, Joseph II indeed commissioned construction of the route, exactly long, from Vinko Struppi, a military engineer, and the road, named after the Emperor, was completed in 1779. The original route comprised very steep sections and 20% inclines were not uncommon. There was even one climb at a 30% grade. Because of this the road was modified and extended by , in order to remove such steep sections. The first reconstruction was carried out as early as late 18th century, and another one between 1833 and 1845 managed by Field Marshal Josef Philipp Vukassovich ((クロアチア語:Josip Filip Vukasović)) and Josip Kajetan Knežić respectively. Subsequent modifications were not as significant. The road was paved in 1950, when the last minor modifications of the route were executed. The route was distinguished by mile markers along the route, an obelisk in Karlovac marking the beginning of the road and a specially built gate in Senj marking its end. Most remarkably the original road included a stone bridge across three spans in Tounj, which was expanded during the reconstruction of 1845 and now has two levels. The upper level was destroyed during World War II, but it was rebuilt in the 1950s. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「D23 road (Croatia)」の詳細全文を読む スポンサード リンク
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