Transurban’s share of revenue from its portfolio of toll roads rose 2.5 per cent in the September quarter, driven partly by an increase in tolls on some roads.

Transurban owns 100 per cent of Melbourne’s CityLink toll road, and 100 per cent of the Hills M2 and Lane Cove Tunnel in Sydney.

It also has a 75.1 per cent stake in Sydney’s M1 Eastern Distributor, a 50 per cent stake in Sydney’s Westlink M7 and M5 South West Motorway, and a 75 per cent stake in the Pocahontas 895 toll road in Virginia in the United States.

Transurban said on Wednesday that for the three months ended September 30, 2012 proportional toll revenue rose by 2.5 per cent to $242.1 million.

“The September quarter has seen continued revenue growth across the portfolio, with the exception of Hills M2, despite the uncertain economic climate and construction disruption on the Sydney network,” chief executive Scott Charlton said in a statement on Wednesday.

Mr Charlton said upgrade work on the M2 remained on schedule to be completed in mid-2013.

Toll revenue on the M2 in the three months to September 30 fell 4.5 per cent and average daily trips dropped by three per cent, compared to the prior corresponding period.

The M5 posted the highest increase in total toll revenue, rising 12.8 per cent despite a 0.1 per cent fall in average daily trips.

Toll revenue from Transurban’s biggest asset, Melbourne’s CityLink, increased by 4.9 per cent and average daily transactions rose by 1.2 per cent.

The revenue figures do not include the impact of the closure of CityLink’s twin Burnley and Domain tunnels on October 3.

Total toll revenue on the Pocahontas 895 in the US rose 6.9 per cent and average daily trips lifted by 6.5 per cent.

Transurban securities were seven cents lower at $6.12 at 1510 AEDT on Wednesday.