Motorists using the roads into and surrounding Leeds are being advised to plan ahead and allow extra time for their journeys with the CLA Game Fair being held in the town this weekend.
More than 130,000 to 150,000 people are expected to head for the showground at Harewood House on Friday 31 July to Sunday 2 August.
Extra traffic officers have been put in place around junctions 45 to 48 of the A1(M) by Highways England on Friday to help cope with the influx of vehicles. We have also put in place overhead signs and additional temporary signs.
Andrew Charnick, emergency planning manager for Highways England in Yorkshire, said:
Up to 150,000 people are expected to attend over the course of the three days and while Highways England does all we can to alleviate congestion on the major routes to the event and keep traffic flowing, obviously it will be busier than normal in this area.
We have a lot of experience of handling events like this and have tried and tested systems in place. We work with our emergency service colleagues and the event organisers to ensure those heading for the event get there with minimum fuss and delays.
Motorists not planning to attend the show should plan ahead and leave extra time and check our twitter feeds and website for the latest information to ease their journeys over that weekend.
Further information visit the event website.
Members of the public should contact the Highways England customer contact centre on 0300 123 5000.
Journalists should contact the Highways England press office on 0844 693 1448 and use the menu to speak to the most appropriate press officer.