The USA’s $1.2tn (£895bn) infrastructure bill, described asa ‘once-in-a-generation’ initiative by President Joe Biden and signed into law in November 2021, has catapulted construction into America’s mainstream news. But in addition to the headline-grabbing projects, there are some less well-publicized reasons why one of construction’s sub-sectors, tunneling, is set for a North American boom.
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