Long queues have been forming during morning rush hour since traffic lights at the Anzac Ave-Frederick St intersection were switched on earlier this month.
The lights' activation signalled the end of one aspect of a long-running dispute between the Dunedin City Council and Dunedin businessman and councillor Doug Hall, which has dragged on since 2011.
But now motorists are being forced to wait as queues form, stretching back several blocks from Frederick St to St Andrew St for north-bound morning commuters.
Council transportation group manager Gene Ollerenshaw told the Otago Daily Times some queues had been expected, but the delays being experienced were ''not a desirable result''.
The council had already received complaints from some motorists, and the situation was being monitored, he said.
''A couple of road users have alerted us to that fact, and we're having a close look at the intersection and how it's performing, which is standard procedure with any projects like this.
''Depending on what the findings are, there might be some tweaks to the traffic lights at that intersection or surrounding intersections ... to help get a better flow of traffic.''
The lights were designed to improve the safety of the intersection for motorists, cyclists and pedestrians, and delays needed to be weighed against that.
Council staff would be monitoring data collected by the traffic lights, and the intersection itself, to see what changes could be made, he said.
That could result in minor tweaks, or more significant changes, to the lights' phasing within days or weeks, he said.
