More than 130,000 people are expected to head for the showground on the edge of Harrogate over the next three days from 14 to 16 July.
Extra traffic officers and free recovery has been put in place around junctions 46 to 49 of the A1(M) by Highways England to help cope with the influx of vehicles.
Andrew Charnick, emergency planning officer for Highways England in Yorkshire, said:
About 130,000 people are expected to attend over the course of the three days and while we at Highways England do 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 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.
Follow Great Yorkshire Show on Facebook and Twitter for all the latest traffic information. Further information about the show can be found on the Great Yorkshire Show 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.