THE cheers of onlookers mixed with 100 balloons and the rumble of a motorcycle convoy in the sky above Cardinia Cultural Centre last Sunday as hundreds sent a 5000-kilometre road safety mission on its way.

It was an aptly moving send-off for Pakenham SES road-rescuers Peter Morrison-Dowd and Shayne Honey who will ride motorbikes for 10 days to Toowoomba and back, spreading their self-coined safety message Think For Six.

Among the crowd was a family who won deep sympathy. The close-knit Scott family lost their youngest daughter and sister Laura, 19, in a car crash 800 metres from the family's Guys Hill home last Mother's Day.

The tragedy profoundly moved Mr Morrison-Dowd, a veteran of 400 road rescues. It sparked him and Mr Honey to create the ride.

"Sometimes you get tired of cutting people out of cars," a tearful Mr Morrison-Dowd told the crowd.

He announced that the cause, previously known as Ride Beyond The Trauma, had been renamed the Laura Scott Foundation.

Laura's father Phil, who attended with wife Julie and children Rob and Sarah, told the crowd he was overwhelmed by the gesture. Within days, he had rounded up $2500 from local businesses to sponsor the cause.

"We know we're not alone here in losing fathers, daughters, mothers and sons," Mr Scott said. "We can't do anything to bring Lauzie back but we can do something to help prevent further injuries ... Something good has got to come out of it all."

Mr Scott paid tribute to the "real heroes" – the road-rescuers who face "horrific challenges".

He thanked the many who had supported the family since Mothers Day – the 1100 mourners at Laura's funeral, the visits and home-cooked meals from family and friends.

Mr Scott said he read every tribute, and every tribute helped.

In recognition of the 100 people who die on roads each month, the crowd sent 100 gold balloons skywards. With a burble of exhausts, Mr Morrison-Dowd, Mr Honey and their convoy of support vehicles departed.

Trailing them were a film crew and eight SES volunteers including Pakenham's Dianne Mason, David Ellison and Isa King. Then there were 50 bikers, some with badges paying tribute to friends lost on the road.

The crew will spread the word at schools, federal parliament steps and on morning TV-show Sunrise. It was announced that the National Road Safety Council would be the campaign's main sponsor. The Think For Six message looks like it could get a lot bigger.

Follow the journey on a daily blog at caseyweeklyberwic k.com.au