There will are eight races scheduled at Uttoxeter Racecourse today, with the Midlands National being the course's biggest fixture of the year.
With around 16,000 attending the event, spectators will see AP McCoy compete, riding favourite to win 'Catching On'.
Jockeys are competing for a prize of £56,000.
There are delays, a road closed and queueing traffic for four miles due to an accident involving two lorries on the A50 Eastbound between A522 (Uttoxeter / Upper Tean) and B5030 Ashbourne Road (Little Chef roundabout).
Uttoxeter's Adam Peaty has won his third gold medal in the pool at the European Championships in Berlin.
The 19-year-old, who swims for the City of Derby, won gold in the 50m breast stroke after breaking the world record for the event in the semis.
He can now add his newest medal to a trophy cabinet which includes two other golds in Berlin for the 100m breaststroke and the 4x100m relay.
Adam Peaty from Uttoxeter has broken the 50m swimming world record for breaststroke at the European Championships in Berlin.
The 19-year-old bettered Cameron van der Burgh's 2009 record, setting a new standard of 26.62 seconds.
That was in the semi-final of the event, and vowed he had plenty leftover for Saturday's final.
The population of Uttoxeter will be doubling this weekend as the Staffordshire town host the Midland's most prestigious racing event.The race, known as the Midlands Grand National, will attract around 18,000 people to the town.
Uttoxeter racecourse normally takes one fifth of its annual profits over the weekend.
Six people have been treated by paramedics after a three-car smash in Staffordshire.
One of the cars had been forced off the road in the crash, which happened at around 9.30am today, and was found down an embankment off the Ashbourne Road in Uttoxeter.
The front seat passenger of that car, a woman, was airlifted to hospital suffering back and chest injuries, while the driver and two teenage passengers - all also women - were taken to hospital with other injuries including seat belt wounds.
A 17-year-old girl from one of the other cars was taken to hospital after hurting her neck in the crash, while an 11-year-old boy, who had been in the third car, was treated at the scene for a minor seatbelt injury.
The contractors, HCL, based at Alfreton in Derbyshire, have apologised for what they admit was an "embarrassing" blunder. Site manager Richard Speake told ITV News Central:
"The structure was old and unsound and basically gave way under the weight of the roof. We will be working closely with the residents to put things right and do the necessary paperwork."
Mr Speake confirmed there was asbestos in the roof, but said they had specialist staff trained to dispose of it and there was no health risk to people living nearby.