The Liberal Party has promised to spend $37 million to add a right-hand turn to the tram tracks on one of Adelaide's busiest intersections.
The right-hand turn at the intersection of King William Street and North Terrace has been controversial, with the State Government previously extending the tram east and north but omitting that section of track.
Liberal leader Steven Marshall said the right turn was needed to make it easier to access the old Royal Adelaide Hospital site, where he is planning to build a Indigenous art gallery and a hospitality training hub.
"It is completely inconceivable that we would have interstate and international visitors coming into the CBD and being told 'if you want to go to the new international standard art and culture gallery you've got to go on the tram, turn left, get off the tram to turn right'," Mr Marshall said.
Mr Marshall promised the turn would be built in his first 12 months in office, meaning the major intersection would be dug up again within a year of its last two-week closure.
Despite the announcement, the Liberal leader remained opposed to Labor's plan to extend the tram into his electorate in Norwood.
"Nobody in Norwood wants a tram going out in that direction, Labor has got this completely and utterly wrong," Mr Marshall said.
"We've had a public meeting on this issue, overwhelmingly people did not want a tram going out to Norwood."
The Labor Government has argued the turn is unnecessary and expensive, and Premier Jay Weatherill criticised Mr Marshall, labelling his approach inconsistent.
"Forget about left-hand turn or right-hand turn, Steven Marshall doesn't know where he's heading in relation to trams," Mr Weatherill said.
Civil Contractors Federation chief executive Phil Sutherland welcomed the Liberals' commitment to a right-turn into North Terrace from King William Street.
"We have been strongly advocating for this specific extension for some time," he said.
"It's a no brainer. The Labor Government's decision not to do so as part of the current extension of the network borders on the ridiculous due to its short-sightedness."
Mr Marshall said he would be announcing more details of his public transport and infrastructure plans before the election, but poured cold water on suggestions he might back a soccer stadium in the city.
"We're very aware that they [Adelaide United] have an interest in having an inner-city soccer stadium but it's not something that we will be advancing at this election," Mr Marshall said.