The Confederation of British Industry in Wales is warning that traffic congestion in towns and cities could be 'starving jobs'.
It comes as ITV Cymru Wales reveals some of the busiest roads across the nation.
Speaking on our current affairs programme, Wales This Week, some commuters say they can spent around five hours a week in traffic, amounting to nearly five days a year.
Questions have now been raised as to why there are so many problems despite investment from the Welsh Government.
Today, the use of cars makes up 79% of all traffic on roads.
The top five most congested roads in Wales are:
M4 South Wales
A465 Heads of the Valleys
A470 North to South
A55 North Wales
A40 West Wales
The Welsh Government say it is working to make sure all communities in Wales are connected and that everyone has access to a quick and reliable transport network.
It's also working on long-term improvements from the third Menai crossing in the North to a new Metro system in the South.
You can see more on 'Gridlock Wales' tonight on Wales This Week on ITV Cymru Wales at 8pm.