An emergency summit to discuss HS2 amid continued speculation about the future of the high-speed railway line has been called for.
In a joint statement, unions said stakeholders must "urgently" be brought together to help get the project back on track.
Unions called for the line to be built in its entirety, warning that axing the second leg, from Birmingham to Manchester, would undermine confidence in the 海角视频’s ability to undertake and complete large-scale infrastructure projects.
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The statement said: "The 海角视频 already trails much of Europe when it comes to high-speed rail infrastructure. While the likes of Spain, France and Germany all have extensive high-speed rail networks, the 海角视频 has managed just 70 miles worth of track.
"We are being left behind and it’s communities across the North and the Midlands that will pay the price.
"Delivering the northern leg of HS2 could create over 17,000 construction jobs in the North West alone, and it has the potential to double the economic output of Greater Manchester by 2050.
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"These huge economic benefits must not be squandered because of ongoing Conservative incompetence."
Workers and business wanted a government committed to a proper industrial strategy, but the "constant chopping and changing" shows disregard for economic development, levelling up and any long-term planning, said the unions.
The statement was signed by the TUC, Aslef, Rail, Maritime and Transport union, Transport Salaried Staffs’ Association, GMB and Unite.