A protest meeting against the tolled-road tunnel - proposed in last month's Eddington Report - will be held at 1pm on May 25 at Flemington's Debney Park. Organised by the Mount Alexander Road Campaign and Royal Park Protection groups, the demonstration also has support from Protectors of Public Lands Victoria - a coalition of more than 80 environment, heritage and community groups.

Public transport expert Paul Mees will address the demonstration. MC is Rod Quantock.

The Kensington Association also plans to host a public forum for residents to ask questions of local MPs and Department of Infrastructure officers.

Association secretary Tony Dare said if the proposed tunnel proceeded, Holland Park as residents knew it was finished.

"Obviously there will be severe impact from noise and pollution on Holland Park, the child-care centre, the recreation centre, houses along Ormond and adjoining streets, and Kensington Road and adjoining streets.

"Large parts of Holland Park will be unusable. Large sections will have disappeared. The impact of this on south Kensington would be horrendous. Obviously, it must never happen."

Royal Park Protection Group secretary Julianne Bell said the park would turn into a quarry.

"The tunnel will have a major interchange undoubtedly in the form of a spaghetti junction at Flemington Road, Racecourse Road and CityLink; a flyover across West Parkville residential area plus Royal Park and possibly across Travancore Park; and it will consume parts of Royal Park West and Holland Park in Kensington as staging points for tunnel construction."