Clem7 tunnel.

Clem7 tunnel. Photo: Glenn Hunt

Legal action over the traffic estimates for the first of Brisbane’s two toll tunnels to go into receivership is set to return to court.

Maurice Blackburn Lawyers is representing 800 RiverCity Motorway investors hoping to recover losses of more than $150 million from the firm which prepared the traffic forecasts for the Clem7.

The tunnel, which goes under the Brisbane River from Buranda to Bowen Hills, went into receivership in February 2011. The Airport Link followed suit on Tuesday.

On Friday, representatives from Maurice Blackburn Lawyers, which began the Clem7 court action in May 2012, will appear in a Sydney Federal Court for a directions hearing.

Engineering consultants, Maunsells, predicted the Clem7 would open with about 60,000 vehicles a day, and would carry an average daily volume of 100,000 vehicles by 2012.

The tunnel, which in December carried about 26,711 vehicles a day, has carried about 25 per cent of the volume predicted since it opened in 2010 and the tolls were introduced.

Maunsells merged with AECOM in 2009, and Maurice Blackburn Lawyers argues the company's traffic forecasts for RiverCity’s ill-fated Clem7 were inaccurate.

It says AECOM failed to reveal earlier traffic forecasts the consultant had developed for Brisbane City Council which produced traffic volumes substantially below those in the product disclosure statement.

In November 2009 Fairfax Media reported concerns a discrepancy amounting to 50,000 vehicles per day between two sets of traffic projections for the Clem7 tunnel.

Meanwhile a spokesman for McGrath Nichol, which on Tuesday appointed administrators for Airport Link, said it was "too early" to say if legal action would be taken against Arup, which prepared traffic estimates for the tunnel.

In 2008, the company predicted 138,885 vehicles would use the tunnel daily after it had been opened for a month.

It forecast that after 15 months, 195,378 vehicles a day would use the tunnel.

The company last night declined to comment on its traffic projections.

The latest traffic figures show an average of 47,802 vehicles use the 6.7 kilometre Airport Link each day.