pressures that push people who might prefer to identify as flexible, multiply constituted hybrids or with one of the now unnamed minority groups into one of the three Bosniac-Croat-Serb constituent nations". These include respondents being encouraged by census interviewers to identity as belonging to one of the three constituent peoples. Her analysis of marriage registration data shows, for instance, that 67 percent of people marrying in 2003 identified as Bosniak or Muslim, which is significantly lower than the 79.6 percent census figure from 2002 (unlike the census, where people respond to an interviewer, applicants to the marriage registry fill in the form themselves). Transportation Roads and highways Sarajevo's location in a valley between mountains makes it a compact city. Narrow city streets and a lack of parking areas restrict automobile traffic but allow better pedestrian and cyclist mobility. The two main roads are Titova Ulica (Street of Marshal Tito) and the east–west Zmaj od Bosne (Dragon of Bosnia) highway (E761). Located roughly at the center of the country, Sarajevo is Bosnia's main intersection. The city is connected to all the other major cities by highway or national road like Zenica, Banja Luka, Tuzla, Mostar, Goražde and Foča. Tourists from Central Europe and elsewhere visiting Dalmatia driving via Budapest through Sarajevo also contribute to the traffic congestion in and around Sarajevo. The trans-European highway, Corridor Vc, runs through Sarajevo connecting it to Budapest in the north, and Ploče at the Adriatic sea in the south. The highway is being built by the government and should cost 3.5 billion Euro. Up until March 2012, the Federation of Bosnia and Herzegovina invested around 600 million Euro in the A1. In 2014, the sections Sarajevo-Zenica and Sarajevo-Tarčin were completed including the Sarajevo Beltway ring road. Tram, bus and trolleybus Sarajevo's electric tramways, in operation since 1884 and electrified since 1895, are the oldest form of public transportation in the city. Sarajevo had the first full-time (dawn to dusk) tram line in Europe, and the second in the world. Opened on New Year's Day in 1885, it was the testing line for the tram in Vienna and the Austro-Hungarian Empire, and operated by horses. Originally built to , the present system in 1960 was upgraded to . The trams played a pivotal role in the growth of the city in the 20th century. There are seven tramway lines supplemented by five trolleybus lines and numerous