Aussie drivers are being warned to be on alert for more potholes as the impact of the Iran war continues to bite.

Skyrocketing bitumen prices caused by Iran's chokehold on the Strait of Hormuz are being blamed for the grim prediction.

The price of bitumen, which holds asphalt together, has soared, rising by about $500 per tonne since the Middle East crisis began, the Australian Financial Review reports.

The majority of Australia's bitumen imports come from key refineries in Singapore, South Korea and Thailand, which source most of their crude oil from the Middle East via the Strait.

However, the war has forced Australia to find alternative supplies, leaving the road construction industry vulnerable to disruption and potentially reliant on a lower standard of bitumen.

Chief executive of the National Transport Research Organisation, Michael Caltabiano, warned that lower road quality would not only impact road conditions but household budgets too.

'The rougher the roads, the more expensive it is to transport your goods and services. The bigger economic-wide implications are poorer quality roads equals higher costs at the supermarket shelves,' he said.

Tony Aloisio, from the Australian Flexible Pavement Association, estimated the cost of road repairs was now around 20 to 30 per cent higher due to the war.

'The only way you won't get potholes is to have the road seal… 80 percent of Australia's road network is a bitumen seal over rock or gravel,' he said. 'If we don't get enough bitumen, then the pothole situation will get worse.'

On Sunday night (US time), Donald Trump announced that a deal had been made to end the war and reopen the Strait. 

However, it may take months for oil prices to stabilise.