A ciclomotor and a bicycle are both on a passable shoulder. The moped rider wants to ride parallel with the bicycle. What does DGT guidance imply?

1. Parallel riding on the shoulder is generally not allowed with other vehicles; the two-abreast exception is for two-wheel mopeds together
2. Any two vehicles may ride side by side on the shoulder
3. The bicycle must leave the shoulder
4. The moped may invade the roadway to keep parallel formation