Trucks wait three to four days to cross the Zambia-Zimbabwe border
More than $1bn (£675bn) has been pledged by international donors for the upgrade of transport links across East and Southern Africa.
The North-South Corridor initiative aims to get goods to market faster and cheaper with improved infrastructure and more efficient border crossings.
The project aims to raise the living standard of millions of people.
The money will come from the World Bank, international development agencies and the private sector.
The UK has also committed £100m to the project at a conference in Zambia.
In order to speed up the transportation of goods from Tanzania, via Zambia to the ports of South Africa, the project will remove red tape and oversee the upgrade of 8000 km of road and 600 km of rail track.
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