The B9175 runs down the Nigg Peninsula in Easter Ross.
The road starts at a roundabout on the A9 between Invergordon and Tain. The roundabout is locally called the Nigg Roundabout, despite being several miles from Nigg itself. From the roundabout, we head south east to cross the railway at a level crossing, and then through Arabella, a very low-lying settlement at the head of Nigg Bay. We then curve round the base of the hills below Nigg village, and drop down to the shore for a mile or so, before reaching an oil rig yard. It is not much further to Nigg Ferry, from where the ferry crosses in the summer months to Cromarty and the A832.
Before the A9 was extended north in 1935, everything north of Inverness was in Zone 8, which is why our road became the B863 when first classified in the late 1920s. When the road was moved into Zone 9 it was renumbered the B9163.
The B9163 continued, as it still does, across the Black Isle on the far side of the Nigg Ferry. However, by the 1960s the Nigg Ferry was for foot passengers only, and so our road had become unclassified. At some point in the late 1980s or early 1990s the road was reclassified as the B9175, the different number being issued to disconnect it from the surviving B9163 on the Black Isle. The date can be pinned down as between the mid 1970s when the Tain Bypass was opened, creating the B9174, and 1991 when the Dornoch Firth Bridge opened, creating the out of zone B9176.