Micro-trenching is a fibre-laying technique that uses specialised machines to cut a narrow and shallow trench into a road’s surface, alongside the pavement where the curb and the tarmac meet, ...

It described shallow trenching technologies as "high risk", but said there might be situations where micro-trenching could be used without having a detrimental knock-on effect for other utilities.

The digging process occurs via either trenching or horizontal boring, with the latter utilised in order to minimise digging through driveways, NBN added in response to another Question on Notice.