Favourites for the National include Mon Mome and The Package
Racegoers are being urged to use public transport to attend this year's Grand National in Merseyside.
The meeting takes place at Aintree Racecourse in Liverpool from Thursday 8 to Saturday 10 April.
The northbound lane of the A59 at Rice Lane is closed between Hornby Road and Cavendish Drive in addition to usual road closures around the racecourse.
However, additional trains and a park and ride will be in place throughout the meeting.
Neil Scales, Chief Executive and Director General of Merseytravel, said: "During the Grand National we will have more and bigger trains running between Liverpool and Aintree and regular bus services will be operating throughout.
"We would urge people to use the strengthened train service, to use the free car park facilities at many of our stations and to use the regular bus services going to and from the event wherever possible."
British Transport Police have issued warnings to passengers over personal safety.
Open bottles and cans of alcohol will be banned on all trains leaving Aintree for the duration of the race meeting.
Chief Insp Neil Moffatt said: "Drunkeness on the railway is an issue and one which we do not take lightly."
The weather is forecast to remain dry over the three days, with Saturday being the warmest with a maximum temperature of 14 degrees.
Favourites for the National include Big Fella Thanks, Mon Mome and The Package, although the final 40 runners and riders will not be announced until Thursday morning.