Nigg Roundabout
| Nigg Roundabout | |||
| Location Map ( geo) | |||
 | |||
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| Location | |||
| nr Arabella | |||
| County | |||
| Ross-shire | |||
| Highway Authority | |||
| Transport Scotland | |||
| Junction Type | |||
| Roundabout | |||
| Roads Joined | |||
| A9, B9175 | |||
The Nigg Roundabout lies on the A9 between the Invergordon and Tain bypasses. It serves a dual purpose of being the junction with the B9175, once a busy road to the oil terminal at Nigg, and also helping to turn traffic on the A9 through a 90 degree bend. There is also a fourth, unsigned, exit leading to Calrossie House.
Before the roundabout was built, this junction was a simple T-Junction, apparently originating as a TOTSO, but later being developed so that the A9 cut off the corner, leaving a triangle junction for the B road. This B road was originally part of the B863, which had crossed the Cromarty - Nigg Ferry, then renumbered as the B9163 when the A9 was extended in 1935, before being declassified. It was later classified once more, this time as the B9175 to prevent confusion with the surviving part of the B9163 on the other side of what was then a passenger ferry.
Routes
| Route | To | Notes |
| Thurso, Tain, Wick (A99) | ||
| Inverness | ||
| Nigg |