A national plan to halve the road toll by 2030 will be sent back to state and territory governments to revise, following experts claiming that it would fail to reduce road deaths and could be vulnerable to exploitation for pork-barrelling.

Reviewers of The National Road Safety Strategy to 2030, released over Christmas, have recommended tying funding to measurable improvements in road safety and this had not been adopted as part of the plan.

Deputy Prime Minister Barnaby Joyce - who holds chief responsibility for road safety said that he had heard the complaints and would retable the strategy to state transport ministers at next months meeting.