But Kiwirail and the Dunedin City Council say drivers should exercise care at any level crossing, and that alarms will be installed by the end of August and trains have been slowed to 10kmh in the area.
A controlled crossing to Magnet St, where rowing and yachting clubs are located, was closed last week to make room for the new stadium construction site.
It was replaced with a level crossing with stop signs, but no alarm system, further along the line on a new access road between Parry and Magnet Sts.
Council transportation operations manager Graham Hamilton said the stadium was on a tight time-frame so the council had asked Kiwirail to expedite the new crossing location.
However, Dunedin mother Lynn Carty said it was "ludicrous" to expect people to cross railway lines without signals or lights, especially in the dark.
She feared for the safety of her 16-year-old daughter, Lauren Mathewson, and others who regularly had to cross the line, often in the dark.
Lauren said lights in distant Ravensbourne and on buildings alongside the track made it difficult to pick out a train.
Ms Carty said it was not practical for road users to have to wait six weeks for new alarms to be installed.
"I honestly believe it is a safety issue. What if someone gets killed in the meantime?"
Her fears were backed up by Otago University Rowing Club chief executive Glen Sinclair, who said he believed authorities had grossly underestimated how many people used the crossing.
Mr Hamilton said Kiwirail had accepted the interim safety measures of stop and warning signs.
"If railways had a reservation they would have said no."
The interim measures were cost-effective and the council had not wanted access to the stadium site to be "a stumbling block all round".
Kiwirail spokeswoman Ruth Larsen said the company recognised the situation was not ideal and moving crossings without the accompanying lights and bells was not something Kiwirail usually did.
It was working to get the alarms and lights in place in four weeks' time.
The crossing had also been moved for safety reasons, to stop people crossing the lines at other spots after the street configuration changed.
She urged people using the crossing to take the same care they would on any level crossing.
Train lights could be picked out from other lights as they were triangle-shaped and the bottom parts of the triangles flashed as trains approached crossings, Ms Larsen said.
