What is the correct procedure for merging into moving traffic on a high-speed dual carriageway from an entrance slip road?

1. Use the acceleration lane to accelerate up to matching traffic speed, signal right/left as required, check mirrors and blind spots, and merge smoothly into an open gap without impeding existing traffic
2. Come to a complete stop at the start of the slip road and wait for all lanes to clear
3. Merge immediately at 20 km/h across the solid chevron markings
4. Force your way into the lane by driving on the shoulder until traffic yields