What special priority rules apply to a police convoy or escorted motorcade displaying flashing red and blue lights (vozila pod pratnjom)?

1. They have absolute priority over all other traffic, including standard emergency vehicles (blue lights) and pedestrians, and may not be overtaken or crossed
2. They must obey the standard right-hand rule at all intersections
3. They have priority only when travelling on motorways
4. Other vehicles may join the convoy if they maintain adequate following distance