Around 16,000 farmers are expected to arrive at the NEC today, when the Royal Association of British Dairy Farmers stages its biggest dairy show yet.
Some of the latest industry innovations will be at the show, including robotic milking machines, milk pregnancy test kits, computerised neck collars to detect cows' fertility and 'text messaging' feeding machines.
More top news
Highways England says the closures are taking place during the summer holidays as the roads around Birmingham are much quieter.
A dry start with sunny intervals.
Kumran Ghalib stayed in hiding abroad while his 18 accomplices were jailed for a combined total of more than 200 years.