There is no shoulder on 235 at Town Creek Drive. It is a travel lane designated for right turn before the next intersection, and as such can be used to merge with traffic on 235 when possible. The previous intersections on 235 of Millstone Landing Rd., Rue Purchase Rd. and Expedition Dr. all have islands that channel you onto the right turn only lane of 235 where you can then merge into the through lanes of 235.
I have always used that lane to speed up to merge with traffic. :shrug: