The incidents have been reported in the Holmbush area of Adur in West Sussex.
Photos show road signs have been damaged by graffiti, with a large amount of fly-tipping in the area.
National Highways, which in in charge of the road, has issued a statement.
A spokesperson said: “We are aware of this vandalism and we are working hard to resolve it. Spending time and money on something we shouldn’t need to address is deeply frustrating.
“The process of removing graffiti from the gantry signs is complex and ongoing and we thank road users for their patience while this is carried out.”
The government agency said it is ‘also upgrading security’ at the access points to these gantries to ‘prevent further damage’.
1. A27 vandalism and fly-tipping
Photos show road signs have been damaged by graffiti in the Holmbush area, with a large amount of fly-tipping in the area. Photo: Eddie Mitchell
2. A27 vandalism and fly-tipping
Photos show road signs have been damaged by graffiti in the Holmbush area, with a large amount of fly-tipping in the area. Photo: Eddie Mitchell
3. A27 vandalism and fly-tipping
Photos show road signs have been damaged by graffiti in the Holmbush area, with a large amount of fly-tipping in the area. Photo: Eddie Mitchell
4. A27 vandalism and fly-tipping
Photos show road signs have been damaged by graffiti in the Holmbush area, with a large amount of fly-tipping in the area. Photo: Eddie Mitchell