They will result in Constitution Hill and The Mall being closed throughout the weekend, rather than just on Sundays, creating a traffic-free zone around The Green Park and St James’ Park.
Today’s announcement of the start date includes the first details of the new restrictions in Richmond Park, where there are high levels of through-traffic.
As revealed in the Standard last month, car parks will remain open but the restrictions in Richmond Park will prevent motorists from using some roads as a “rat-run”.
The restrictions will be eased during the week but applied in greater force at weekends.
Many of the restrictions have already been in place temporarily since the start of lockdown in March in an attempt to limit the spread of coronavirus.
In Hyde Park, North Carriage Drive will be closed full-time while South Carriage Drive will be closed on Saturdays, in addition to its existing Sunday closure.
In Greenwich Park, the Avenue will be closed full-time.
In Bushy Park, Chestnut Avenue between Teddington and Hampton Court Gates will be closed full-time.
In Richmond Park, access from Sheen Gate and from Robin Hood Gate to Broomfield Hill car park will be closed.
In addition, the road between Roehampton and Richmond gates will be closed at the weekend to create a “quiet zone” on the north side of the park.
Mat Bonomi, head of transport for The Royal Parks, said: “Our visitors come to our parks to escape the busy city.
These trials will help us create new, car-free spaces for Londoners to soak up the natural environment on their doorstep.
“The health and happiness of Londoners has never been more important. We hope that these important first steps will go a long way to enable increasing numbers of visitors to walk and cycle in the parks safely and peacefully.”
The trials will be monitored through visitor satisfaction surveys and feedback from stakeholders. A formal consultation will be launched in November.
Restrictions on traffic using Regent’s Park are likely to be brought forward at a later date.