We need to look at reducing traffic levels overall, not just in the park. Demand always grows to the supply of roads. The more roads we provide, the more cars there are. The fewer roads there are, the fewer cars there are. Examples that demonstrate this are the M25 and Hammersmith Bridge closure.
Cars also kill around ten people each and every day in the UK through accidents.
We must reverse global warming and pollution else the UK will be gripped by further floods. We must encourage the use of cycling and public transport. We must teach our kids the benefits of countryside without the noise, danger and pollution of cars. Ban cars from Richmond Park. Implement neighbourhood zones on residential streets where pedestrians have right of way over vehicles.