Police estimate about 100 vehicles joined a convoy through Bristol protesting over the price of fuel.
Saturday morning's protest involved lorry drivers, motorcyclists and cars starting at Avonmouth before travelling on the M5 and the Avon Ring Road.
Organisers said the protest was a "last resort" and they hoped Gordon Brown would listen to them.
"It went really well. We had people at the side of the road waving in support. It affects all of us," one said.
'Contingency measures'
No major delays were reported in the city as a result
Avon and Somerset Constabulary said it had contingency measures in place should the drivers do anything unexpected.
BBC reporter John Bennett estimated there were more than 70 trucks involved in the convoy as it travelled along the Bath Road in Bristol towards the ring road just before 1000 BST on Saturday.
He said there there had been some queues on the ring road and its approach, but no major disruption.
The protesters set-off at 0830 BST from Avonmouth and travelled to the Hicks Gate roundabout near Keynsham before dispersing at about midday.
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