They also walked in the memory of five young people who lost their lives in two separate crashes at the intersection of Hallam and Ormond roads in Hampton Park.

In an emotional high point, five white doves were released as a symbol of the lost lives. "This is just the start of a long fight (for duplication)," main organiser Erika Maliki said after participants, who met at the smash site for a minute's silence, had walked alongside Hallam Road to St Kevin's Primary School for speeches.

On June 28, Anja Miler, 15, of Hampton Park, and Riyani Lowen, 16, of Narre Warren South, died when a car driven by friend Joel Brimble, 19, also of Narre Warren South, collided with another car. Joel died on his way to hospital and a Frankston man in the other car died at the scene.

Less than two weeks later, Melissa I'Anson, 20, died when her car and a truck collided. Police believe she was probably distracted by the roadside shrine that had sprung up at the site.

Principal Rob Casamento of the Narre Warren South P-12 college, where Riyani and Anja attended and Joel was a former student, said the school had been rocked by the deaths.

"For the welfare of all members of this community, it's so vital we do whatever is necessary to make this road safe," Mr Casamento told the crowd.

After the walk, a Government spokesman told the Journal there were still no duplication plans.