The cost of fuel remains the main concern of haulage firms in the UK, according to a report from the Freight Transport Association (FTA).
Fuel prices topped the list of worries in the January 2012 update of the FTA's Manager's Guide to Distribution Costs 2011.
The findings come as haulage operators continue to endure rising operating costs alongside increasing pressure for earlier payments from suppliers.
FTA Research Analyst Bruce Goodhart said: "Fuel now represents around 40 per cent of annual operating costs compared to around a third just three years ago."
According to the figures supplied in the report, the cost of replacing tyres among haulage firms has risen by 9.2 per cent over the past year, with a four per cent rise for overheads over the same period.
The research also showed vehicle operating costs had climbed 3.7 per cent for year with a 6.3 per cent increase in the price of diesel.