Don't really understand the question. Your example should work just fine.
Name the lines codes in the feature editor TBC, EP, CRN without the number suffix; and in Access you use the plus sign to add the number.
TBC will parse the code and recognize TBC01 and TBC02 as similar and i.e. re-layer/colour etc. as set for TBC; but will create two separate strings since the number is different.
Example below "picked up" in zigzag pattern, but lines automatically connected in road direction.
