Traffic on Transurban’s WestConnex toll road has surged since the opening of Sydney’s controversial Rozelle Interchange late last year – and use of the underground tunnels has soared almost 10 per cent over the past 12 months.

The toll road group’s first update since the opening of the interchange, which connects with WestConnex and is unpopular across a swath of inner Sydney where it has caused congestion on other roads, showed there were 303,000 average daily trips on the motorway in the three months to the end of March.