Police have been putting in some road closures for the Wickham Horse Fair.
The fair takes place in The Square, which will be closed to traffic from 4.30am until 8pm on Saturday evening.
The A334 Winchester Road will be closed between the traffic signals at Blind Lane and the roundabout junction of the A32.
The nearside lane of the A32 southbound at Hoads Hill, from junction A334 to top of the hill will be used for parking.
Any vehicle parked in an unauthorised place will be towed away.
Motorists who are not going to the fair are advised to allow extra time for their journey.
Chief Inspector Alison Heydari said: “If you are planning to attend the horse fair, please familiarise yourself with the road closure and parking arrangements and plan for your journey and attendance accordingly. These arrangements have been made to keep disruption and inconvenience to local people and motorists to a minimum.”