Furious residents in Melbourne's west will blockade a rail yard set to become a dumping ground for the West Gate Tunnel's toxic soil, while thousands are expected to hold a rally at Parliament House to pressure the Andrews government to abandon the controversial proposal.

Voters in Treasurer Tim Pallas' Werribee electorate — who successfully opposed a Labor plan to build a youth detention facility in Werribee in 2017 — will use similar tactics to overturn a proposal to store contaminated soil at a Wyndham Vale rail yard, just metres away from housing and four planned schools.

About 300 residents who were at a community meeting in Werribee on Wednesday night booed Mr Pallas, howling "bullshit" and "shame" as the Treasurer tried to talk up the benefits of the toll road.

Mr Pallas was forced to stop his speech plugging the $6.7 billion toll road several times, as some locals yelled "Dump it in Williamstown", referring to the suburb where Mr Pallas lives.