North Hill Interchange is the unofficial name for junction 10 of the M27.
The junction allows A32 traffic to use the M27 in order to bypass northern Fareham. No other sliproads are provided to prevent extra traffic entering Fareham.
For a long time there have been talks about making the junction full-access as part of plans to develop the land to the north of the motorway. A secondary reason for the change is to allow the A32 to be reconfigured as a local road, that is less encouraging of fast, through traffic. This was expected to happen in 2019 with construction of a new dumbbell to the west of the existing junction, but that plan has hit planning difficulties.
It is the quietest junction on the M27, as the A32 serves few significant settlements, although the junction is sometimes used as a shortcut to the M3. It featured in the initial Ramp Metering trial, but the signals were soon removed. As it is such a quiet junction, there has never been much reason to name it, but official planning documents called it Roche Court Interchange.