A roadside memorial is a marker that usually commemorates a site where a person died suddenly and unexpectedly, away from home. Unlike a grave site headstone, which marks where a body is laid, the memorial marks the last place on earth where a person was alive – although in the past travelers were, out of necessity, often buried where they fell.
Usually the memorial is created and maintained by family members or friends of the person who died. A common type of memorial is simply a bunch of flowers, real or plastic, taped to street furniture or a tree trunk. A handwritten message, personal mementos etc. may be included. More sophisticated memorials may be a memorial cross, ghost bike, or a plaque with an inscription, decorated with flowers or wreaths.
Roadside memorials are a statement of grief and love from the loved ones of the accident victim(s).
But apart from their personal significance, these memorials also serve as a reminder and warning to other road users of the dangers of driving, and to encourage safer driving. In the 1940s and 1950s, the Arizona State Highway Patrol began using white crosses to mark the site of fatal car accidents. This practice was continued by families of road-crash victims after it had been abandoned by the police. The ghost bike phenomenon, where an old bicycle is painted white and locked up at an accident site, serves the same purpose in relation to cycling casualties.
Historically, roadside memorials were personal memorials, but there is a modern trend toward public memorials of increasingly large size. Typically little or no effort is made to make the memorials accommodate the natural beauty of the landscape and many roadside memorials, over time, lack proper maintenance.
The phenomenon of roadside memorials may be associated with another growing trend: public outpouring of grief for celebrities. The death of Diana, Princess of Wales, for example, precipitated an avalanche of flowers and wreaths at the Pont de l'Alma road tunnel in Paris, the site of her death, and at Kensington Palace, her home in London. While car-crash victims are rarely so well known, something of the same sort of impulse to make a public display of emotion at the site of a tragedy may be partly responsible for the growing popularity of roadside memorials. The broad phenomenon of creating improvised and temporary memorials after traumatic death (accidents, murder, disasters etc.) has become popular since the 1980's. Because of their non-institutionalized character they are generically coined as grassroots memorials.