A London teenager is calling on the government to ban cars in Richmond Park every Sunday.
The 17-year-old wants a car-free day to promote cycle safety, and comes after both Bradley Wiggins and his coach were injured in accidents this week.
Paul Brand went to Richmond Park to see how the idea is going down.
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Commuters could be caught out by the alterations which will see many existing trains leaving stations up to two minutes early.
Dog walkers in Richmond, south west London, will now be limited to walking four dogs at a time.
The pictures, which have not been made public before show the devastation caused after the IRA truck bomb exploded.