I made a post a while ago that its only a matter of time before the Mitchell Freeway becomes a car park and most people replied that the train is there as a viable alternative.
Reports today suggest that the Joondalup line is at critical and people looking to board the train Greenwood onwards are struggling to get on trains due to overcrowding.
The long-term approach to infrastructure and population distribution here is severely flawed. There are no plans in the budget to extend or widen the Mitchell Freeway, or develop another one. There are no plans to provide extra trains however there are plans to provide extra stations, albeit that that process will take years. Marmion Avenue was extended to Yanchep to provide an alternative route but it is only 1 lane each way.
Given that expectation is that up to 20,000 additional people will live in the Northern corridor over the next 10 or 15 years, it's going to get a lot worse.