ljubljana slovenians vote referendum sunday whether government pursue construction 1-billion-euro 1.20 billion railway main adriatic port test government popularity ahead elections next year give opposition lead opinion poll criticism project expensive analysts see possible change center-left coalition government ahead elections june july 2018 railway get thumbs-down referendum reject would strong blow government particularly lead party smc party modern centre meta roglic political analyst daily dnevnik tell reuters opinion poll forecast vary outcomes referendum suggest turnout might sufficient block railway project poll publish daily delo say voters would narrowly reject project another release dnevnik say voters would back 53-29 percent margin slovenian law minimum 20 percent 1.7 million eligible voters would need sink project addition majority vote civil society group taxpayers give lead opposition group center-right slovenian democratic party sds push referendum say railway line project government costly government say 27-km 17-mile rail link koper town divaca necessary speed freight traffic slovenia port improve port competitiveness government receive 44.3 million euros eu fund preparation track neighbor hungary say will invest 200 million euros rely koper much seaborne freight opposition sds lead opinion poll past year government party hope improve rat advance railway project raise family subsidies low tier wag inject money state health sector come months slovenian government face test pre-election investment referendum