Emergency services are having to use back roads to get to call-outs in time as Tauranga's traffic congestion worsens.

Data released by Infometrics shows traffic flow into and around the city has grown by 5.2 per cent over the past year.

The statistics came three months after the Bay of Plenty Times reported concerns from Katikati, Ōmokoroa and Waihī volunteer fire brigades about not being able to get to emergencies quickly due to traffic buildup on State Highway 2.

This week, the Bay of Plenty Times revealed there are 767,000 more vehicle movements through 10 of Tauranga's busiest intersections weekly,