People will no longer be allowed to leave permanent roadside memorials to loved ones who have been killed in crashes in East Sussex.
Floral tributes are laid at the scene of fatal road accidents
The county council agreed that flowers and tributes will be moved after three months because they can be distracting for drivers and people visiting them.
Councillor Matthew Lock said: "We do not want to stop people grieving."
Local residents involved in an accident or who live near the scene will also have a say in where flowers are placed.
The council was attacked by the families of road accident victims in June when it considered restricting roadside memorials.
The Roadpeace charity said it was important for bereaved families to have somewhere they could go.
The authority said it would work with families to look at suitable places where permanent memorials, such as a tree or bench, could be put safely.
Mr Lock said the decision to ban permanent memorials was not taken lightly.
"This is a highly sensitive issue both for families who lose a loved one and for local people living near the scene of an accident."
He added that permanent memorials also caused difficulty and were dangerous to highway staff who maintained roads and verges.