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Operation Stack is no longer in place, with the the M20 motorway now fully open to traffic as the county show enters its busy weekend days.
The system - which allows lorries to park between junctions 8 and 9 of the coast-bound M20 while a backlog is cleared - is now no longer in force.
But police warned there may still be delays while the road network returns to normal.
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There were fears the traffic problems may affect the county show.
About 80,000 people are expected at this year's show, and with several high profile events near the site this weekend, there were concerns that roads could become gridlocked.
Leeds Castle is holding its Proms in the Park on Saturday, which also sees the Cancer Research Race for Life in Maidstone's Mote Park.
Both events are expected to attract several thousand people.
It's showtime - the Kent County Show opens its gates
Video: The Kent County Show opens - Graham Stothard reports
This year's show features several new additions, with a display by the Red Arrows earlier today.
The Metropolitan police horses will be performing and there will also be old favourites including Titan the robot, and the Kent Spitfire fly over.
This year the show features more free entertainment including donkey rides and circus skill workshops.
Ms Hegarty said: "Come along, enjoy the sunny weather, but be aware and keep an eye on our facebook and twitter pages, and on Kent Police and Kent Highways.
"Do come prepared - if there is traffic, bring water with you and any medication you need, but hopefully everything should flow as normal."
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