New traffic arrangements are being put in place to cut the queues of visitors flocking to Pink Floyd drummer Nick Mason's Open Garden event.
About 11,000 people are expected to visit the rock star's 18th Century country home near Corsham, Wiltshire, on 7 and 8 June.
The annual event, which features the musician's collection of Ferraris and hundreds of supercars and classic vehicles, attracts owners and enthusiasts from all over the UK and further afield.
The proceeds are in aid of Wiltshire and Bath Air Ambulance Charity and the Wiltshire Bobby Van Trust.
Organisers have responded to past traffic issues by working with Wiltshire Police, Wiltshire Council and local landowners to create a new entry route.
"Thanks to the co-operation we've had we are now able to open a separate entrance for cars heading on to the site from Chippenham," said Jennie Shaw, Director of the Bobby Van Trust.
"We've listened to the feedback we've had from residents, visitors and exhibitors and we think this will make it much easier for everyone."
Cars arriving from Chippenham will now turn into a field before Middlewick Lane, with hopes the change will ease congestion. AA signs will also help divert non-event traffic.
The event will run from 10:00 to 17:00 BST, opening an hour earlier than before. More caterers have been added to reduce queues and offer a wider food selection.
