Project Gutenberg has a copy of the Victorian-era (The Municipal and Sanitary Engineer's Handbook)[http://www.gutenberg.org/ebooks/55935 http://www.gutenberg.or

Project Gutenberg has a copy of the Victorian-era (The Municipal and Sanitary Engineer's Handbook)[http://www.gutenberg.org/ebooks/55935 http://www.gutenberg.org/ebooks/55935]. There's a good discussion on how to write a paving contract on about page 35, including a quick discussion of using machinery to crush rocks for the road surface. It turns out that different machines produce wildly better or worse crushed stone, and that it makes a difference. And there's a snarky comment on page 163 about companies that have to fix roads after ripping them up ("breaking"): if they do condescend to cart anything away it is generally the metal, which they think will come in nicely for the repairs of the trench during their liability for such repairs. TL/DR: your town engineer just needs to specify the right stuff in the contract, and the road paving companies will just have to adapt. If you think about it, the same thing holds true for any large, bespoke contract. What you get at the end depends in part on the supervision you put in.