A report stated that improving a rail junction would remove about 100,000 lorry trips from the road each year.
According to Keeping Trade on Track, a new Ely junction in Cambridgeshire would double passenger service on the Ely-Kings Lynn and Ipswich-Peterborough routes.
According to a report by England's Economic Heartland and Transport East, the changes were "of national significance.".
Network Rail predicted the project would cost £466 million.
Another attempt is made to convince the government to upgrade the infamous bottleneck in the new report from the two primary organizations that investigate transportation issues in the East of England.
Focusing on the effects on rail freight, it calls the route from Suffolk's Port of Felixstowe to the Midlands and North of England "the most heavily used and nationally significant rail freight corridor on the network.".
The Victorian railway that serves this corridor, which is crucial for Britain's trade with the rest of the world, is no longer functional, according to the report.
Improvements to the junction, it was added, would enable the use of six additional freight trains per day, or the equivalent of 450 trucks traveling more than six miles.
Additionally, it forecasts that Ely would see 277,000 more rail passengers.
The report stated that the work would have a high cost-benefit ratio of £4.89 for every pound invested and reduce carbon emissions. Network Rail stated that it would take six years to complete the junction signal and level crossing improvements.
Ministers and employees of the Department of Transport, according to what I've been told, "get the argument," but the Treasury is concerned about the cost.
The final section of the East West Rail line, which connects Oxford and Cambridge, has a proposed route, and the government recently announced funding for a new Cambridge South station.
Huw Merriman, the rail minister, advised patience and noted that there would be more spending announcements, but he also cautioned that funds were limited.
We have a funding envelope that can only go so far, he explained.
"A significant portion of it will be spent in Cambridge... and we need to gauge our progress nationally. ".
The freight industry and regional business groups concurred with the local MPs who recently referred to Ely Junction as the most critical infrastructure project in the area.
They will be hoping that the fresh report will help them further their case.
The need for "rail capacity improvements at Ely is of national significance," according to Liz Leffman, vice chair of England's Economic Heartland and leader of Oxfordshire County Council.
The project is a crucial link between the economies of the North and the Midlands and has the potential to significantly reduce traffic on key roads and the emissions produced by HGV trips that are better made by rail.
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