Police, the Highways Agency and local councils are today warning of chaos on the roads around the Olympics.
With cycling and rowing near the M25 drivers, are being warned to expect long delays.
Despite substantial investment in the roads to Weymouth, the Highways Agency says visitors should also allow for plenty of time to get to the sailing events.
More top news
Paddington station had to be evacuated due to a fire alert this morning, causing disruption for passengers
The RAF and Royal Navy were tasked with a 2,000-mile round trip to rescue a British cruise passenger bitten on the arm by a seal
Philippa has the weekend weather outlook for the east