Recession means increased public works spending There is material documentation evidence that 1$ spent by governments on infrastructure generates over 1.5$ in economic activity, more so when infrastructure projects are cost-effective (for instance the more users, the higher the benefits; also lesser construction, operations and maintenance costs improve the project rates of return) and the literature indicates that this is more so during a recession.
During the great depression of the 30s (Roosevelt's New Deal investment program) and the great recession of 2008-2009 and COVID, governments spent heavily on public works in accordance with Keynesian economics to support employment and accelerate economic recovery. It has always helped.
The effectiveness of government spending on anything (like a grant to a battery manufacturer) depends on the size of fiscal multipliers or how much economic activity is generated from every dollar spent.
Substantial documentation estimates such multipliers. Overall, the largest multipliers are found to be associated with public investments, as opposed to other types of spending. The size of multipliers is sensitive to economic conditions. During recessions, public works spending offers higher multipliers.
This is based on a literature review of over 100 academic papers summarized in the link below. The full synthesis is also below. Good reading.
All this to say that should we hit a recession, more projects will come along to stir economic activity. All economic advisors read the same papers...
https://blogs.worldbank.org/en/ppps/effectiveness-infrastructure-investment-fiscal-stimulus-what-weve-learned
https://documents1.worldbank.org/curated/en/178841633526651703/pdf/What-Have-We-Learned-about-the-Effectiveness-of-Infrastructure-Investment-as-a-Fiscal-Stimulus-A-Literature-Review.pdf