Traffic built up around Weston Park as 85,000 fans started to arrive for this year's V Festival.
Police warned of delays and urged drivers to be aware of stationary traffic on the A41, A5 and M54.
Justin Timberlake and The Killers will headline this weekend and the superstars will be joined over two days by more than 100 other acts including Kaiser Chiefs, Ed Sheeran and Example.
With campers arriving from 7am today traffic was building, although the Highway Agency reported that early on the V Festival traffic was better than usual.
On the A5 at Weston-under-Lizard there are already delays of up to 15 minutes both ways around Lichfield Drive Pickemere Island and School Lane, with congestion also on the A41 in Tong between Albrighton and Offoxey Road.
More than 35,000 people are expected to use the M54 to travel to the site today, and motorists are advised to leave plenty of time as speed cameras will remain in place over the weekend for their journey.
Final touches have been added to the main stage by a team of more than 300 during the last 24 hours.
With just one day to go before the music starts, festival organiser Dawn Woodhouse, who has overseen V for 14 years, said everything was on track.
She said: “For the first time in a long time, the weather during the build-up has been really kind to us and that has made a big difference. We have been on track throughout and are now ahead of schedule.”
However, fans looked set to be face with rain at the site during the day today.
After 14 years, it is a schedule Mrs Woodhouse knows well but the buzz of the job hasn’t disappeared and she is just as excited as the visitors. She said: “My favourite part, after 11 months of hard work, is to watch the fencing come down and thousands of campers rushing towards the stages. It is just amazing to see.”
Stages, campsites, VIP areas, fairgrounds, attractions and a food village have all been set up and while the majority of campers will rough it in the main fields, those who prefer to sleep in style can choose a hotel bell tent for two for more than £1,500.