Leading Senior Constable Lynnette Taylor, Senior Constable Kevin King and constables Glen Humphris and Josh Prestney lost their lives last Wednesday when a refrigerator truck ploughed into them on the Eastern Freeway.

On Wednesday, one week since the tragic incident, south-west fire brigades sounded their sirens four times at 5.40pm to honour the fallen police officers.

Wreaths were laid and a moment's silence was observed before the blasting of the sirens.

In Warrnambool, four trucks lit up at the Mortlake Road fire station as people gathered, 1.5 metres apart.

Ambulance Victoria, SES and police members also attended their local fire stations to show their respect.

Colac Fire Brigade thanked all of the emergency services who attended their service.

"We work side by side at incidents and no matter the uniform, we all grieve the losses," a spokesperson said on Facebook.

"Unfortunately with current restrictions, members of all services weren't able to attend to pay tribute. The memorial placed on the bell at the front of our station will remain in place for those wishing to pay their respects (without breaking restrictions of course)."

Truck driver Mohinder Singh, 47, been remanded in custody until October after facing court on Monday over four counts of culpable driving over the deaths.

Senior Constable Taylor will be farewelled at the Police Academy at Glen Waverley on Thursday, followed by services for Constable Humphris and Senior Constable King on Friday.

However due to strict social isolation measures because of COVID-19 the private funerals will be limited to 10 people. As a result, it will be live-streamed to family, friends and colleagues.

A large memorial service will take place once restrictions are lifted.

South-west police reported having been overwhelmed with community support following the incident.

Warrnambool's Lighthouse Theatre was bathed in blue over the weekend to pay tribute to the four police officers.

And an eight-year-old girl devastated by a horror crash that killed four police officers in Melbourne last week has penned a touching letter to show her support for Warrnambool police members.

Warrnambool's Evie Hollands said when she heard about the tragic deaths of four police officers on the Eastern Freeway, she wanted to reach out and do something nice for her local members.

So she whipped up a batch of her favourite savoury treat, sausage rolls, and dropped them off at the Warrnambool police station with a handwritten letter.

You can see the letter here.

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