✔ 最佳答案
If you use the hard shoulder for anything other than breakdowns or emergencies then you will be committing an offence which will get you a fine and penalty points. So your stepfather certainly gave the wrong answer and should re-read the Highway Code.
Normally traffic joining a motorway has a duty to match their speed to that of traffic already on the road. Some drivers don't seem to grasp this simple principle and so they end up either barging in or having to stop.
But if the left lane of the motorway (lane 1) is blocked by queueing traffic and you genuinely can't get off the slip road then you just have to stop and wait for someone to give way to you, or the obstruction clears.
This happens a lot where I live (near the M27) at rush hours and bank holidays, and congestion often extends back up the slip roads.