The procession route for Sudbury carnival will have to be modified to allow articulated lorries to take part.
Due to the difficulty in negotiating some of the town’s narrow roads, the larger lorries will need to split off from the main procession at various points.
Carnival chairman Jack Owen said organisers were looking to secure 20 floats.
“We have between 10 and 15 at the moment, but we will have to put any articulated lorries at the back, so they can turn off and rejoin the procession,” he said.
The carnival, which will be held on August 24, will start and finish at the Delphi Centre.
Turning around Suffolk Road has been identified as a problem area.
Mr Owen said applications to be carnival queen, for 16 to 21 year olds, and princesses, for those aged five to 10, were available from the town hall and Tourist Information Centre.
Transport and volunteers are needed to help for the event.
“We want public-spirited people to get in touch and make it a day to remember,” said Mr Owen.
If you can help, call 01787 374025.