According to OS Open Data’s Roads it doesn’t extend to the right from Clairemont Rd to Bolton Rd but it does cover the small section to the left that rejoins Clairemont Rd to the roundabout, fwiw.
I see what you mean. As Firecul says, only the small segment between the ramp and Claremont Rd is the B5228 (according to OSData). That being said. I think it’s best just to have this road, Bolton Rd, on its own. There are no routing issues as both Bolton Rd and Claremont Rd are Primary Streets.
Done. I’ve added the B number as an Alt name to the segment on Bolton Rd between the ramp and Claremont Rd. It probably won’t make any difference, but at least it shows that it’s been taken into account.
@Keith_KJ Won’t traffic on the B9157 now be told to continue onto the A909, then continue onto the B9157? Wouldn’t it be better to leave this segment without a name?