Plans to prevent unauthorised vehicles getting on to green spaces in the city are to be considered by councillors.
They are being asked to set aside £50,000 for preventative work at parks and open spaces, such as Southsea Common and Pembroke Gardens.
Work could involve installing boulders, posts or bollards, or planting trees, to prevent access.
The funding is being recommended as part of Portsmouth City Council's capital budget, which will go before a full council meeting for approval on 12 February.
Cllr Steve Pitt, Deputy Leader of the Council, said: "Our green spaces are precious and we don't want people's enjoyment of them spoiled by vehicles getting on to them.
"At the same time we don't want to change the nature of these beautiful open areas, so we would concentrate on obvious weak points and only do what is absolutely necessary.
"Trees are an obvious way of restricting access without installing any equipment, and we've already planted some on Pembroke Gardens and near Ladies' Mile.
"I hope my fellow councillors will back these plans to set aside this money."
The capital budget invests in a range of infrastructure schemes throughout the city like buildings and facilities, rather than the day-to-day running of council services that have to be paid for through a separate revenue budget.