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14 August 2011
Last updated at 03:36 ET
The biggest test event so far for the London 2012 Olympic Games, featuring more than 150 of the world's leading cyclists, takes place later.
The London-Surrey Cycle Classic takes the riders from The Mall in central London out to Box Hill and back.
British Tour de France star Mark Cavendish is due to take part in the Olympic Road Race dress rehearsal.
There will be widespread road closures and bus diversions along the route to allow the event to go ahead.
Line course Transport for London warned that travel, including access to Heathrow airport and the M25, would be be "severely affected".
The closures are in effect from early on Sunday morning until mid-afternoon.
Thousands of spectators are expected to line the course to get an idea of what the Olympics will be like.
The race will start at The Mall, with cyclists setting off at 09:00 BST, before heading through west London and into Richmond Park.
They will then pass Hampton Court Palace, Walton-on-Thames, Guildford and Dorking before two circuits of Box Hill in Surrey, which is a Site of Special Scientific Interest (SSSI).
Free event The riders will return through Esher and Kingston upon Thames before the home straight back to The Mall. The route passes through six London boroughs and four royal parks.
In total, the men's race will be 240km (150 miles) and the women's 130km (80 miles).
The race is one of a series of Olympic test events that have taken place this week as a dry run for the real thing next year.
It is going ahead despite concerns this week about police resources after rioting around England.
The Olympic cycling road race will be among the events that will be free to view at London 2012.
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The London-Surrey Cycle Classic takes the riders from The Mall in central London out to Box Hill and back.
British Tour de France star Mark Cavendish is due to take part in the Olympic Road Race dress rehearsal.
There will be widespread road closures and bus diversions along the route to allow the event to go ahead.
Line course Transport for London warned that travel, including access to Heathrow airport and the M25, would be be "severely affected".
The closures are in effect from early on Sunday morning until mid-afternoon.
Thousands of spectators are expected to line the course to get an idea of what the Olympics will be like.
The race will start at The Mall, with cyclists setting off at 09:00 BST, before heading through west London and into Richmond Park.
They will then pass Hampton Court Palace, Walton-on-Thames, Guildford and Dorking before two circuits of Box Hill in Surrey, which is a Site of Special Scientific Interest (SSSI).
Free event The riders will return through Esher and Kingston upon Thames before the home straight back to The Mall. The route passes through six London boroughs and four royal parks.
In total, the men's race will be 240km (150 miles) and the women's 130km (80 miles).
The race is one of a series of Olympic test events that have taken place this week as a dry run for the real thing next year.
It is going ahead despite concerns this week about police resources after rioting around England.
The Olympic cycling road race will be among the events that will be free to view at London 2012.
Powered By WizardRSS.com | Full Text RSS Feed | Amazon Plugin | Settlement Statement | WordPress Tutorials