The best way that passing motorists can be of help is to simply keep an eye out for the family anytime they're passing alongside Land Street, particularly at night, but prior encounters have revealed that the family sometimes ends up crossing in the early morning, and other times they've crossed the road in the afternoon after a bit of rain.
Keeping an eye out for them doesn't necessitate driving slower every time, but rather being alert and prepared to take evasive action if by chance the family happened to be on the road at the time.
Cyclists (and the like), can help by keeping an eye out for the family when cycling anywhere near the park, be that the bike lanes along Land Street, the footpaths, and especially the bike path that cuts through the park.
The family can blend into the background, particularly at night, so there have been quite a few close-calls that I've witnessed over the years.
Bike delivery riders from a nearby Pizza store in particular are likely to be at high risk of one-day colliding with the family, as they are often recklessly flying along the footpath, propelled to high speeds by their power-assisted electric bikes...
For those living near the park, if you happen to already spend time at the park, whether that's leisurely, or just passing by, the best way you could help is just to have a look on either side of the road in the evening, to see if it looks like the family is about to cross.
If you do spot the family about to, or already crossing, there isn't too much you can (safely) do, but pointing at the birds is quite an effective way to draw attention to them, as they can be difficult to spot on the road.
But you shouldn't engage in any behaviour that would put yourself at risk of harm, nor risk of harm for others. Traffic collisions, even if seemingly minor, can have dire effects. So don't go suddenly jumping on the road and forcing cars to slam on their breaks. It's not worth it. Stand somewhere safe, and point.
With that in mind, don't go spending your evenings waiting around at the park, just to keep an eye out for the family. There's no knowing if and when they'll cross, there's no way to keep them completely safe. And the road itself is just one of many hazards.
Also, if you are walking your dogs at the park, if you can avoid going too close to the heavily vegetated sections, e.g. the hill on the apartment side of the park, and the tree cover section alongside the hospital, that would help the parents out. Whenever a dog comes close to them, leashed or not, they get quite alarmed and will often as a result distance themselves from their chicks, to try and keep them safe. But as a result of this distancing, it leaves the chicks vulnerable and exposed to any would-be predatorial birds.
So if you're walking your dog, and happen to see the parents looking alarmed and running around, if you keep your distance from them, it'll allow the parents to return to their chicks and keep them safe.
It's heart warming to see the attention that the family has received, locally, nationally, and globally.
However I'm hesitant to elicit the help of those who aren't already near to the family.
The reason for that is, everybody has limited resources, in terms of time, money, and care. There's an alternative timeline where I leveraged the growing popularity of the family to raise funds to help them. Whatever figure raised, those would be resources diverted that would have been spent elsewhere. And chances are, they are better invested elsewhere.
A lot of money could be spent on trying to keep this family safe, and yet they still could die by sheer misfortune. It's not viable nor sustainable to rely on an over-investment of resources to keep them safe.
Have a look around your local area, and see if you can identify local issues you can contribute to instead. Chances are that will be more impactful.
I've previously invested time into contacting and talking with local councillor(s) in an attempt to get Brisbane City Council involved, this has not been a fruitful endeavour.
BCC has made it clear to me on numerous occasions now that they are unable / unwilling to provide any help.
I am personally not too interested in spending more time and effort, only to be turned down once more by BCC. BCC has quite a different mindset and approach compared to other councils, such as Tweed Shire Council.
So if you're a local politician, and you want to help, I can't stop you from involving yourself, but you'll have to sort it out yourself. This website should hopefully give you all the insight you need.