However, this is not the intended purpose as stated by the company Safety 1st, which was marketing the product at the time of its peak popularity.
[2] With her sister Helen she started a company, PHOB, to market them in the US, but had only limited success until partnering with Michael Lerner.
Lerner was told about the signs after recounting his experience of aggressive drivers when driving his baby nephew home in busy traffic.
The company later diversified into infant and child care products and is now part of Dorel Industries.
The song was written by Homer Simpson in a flashback to 1985 when Marge bought a sign, hoping it would stop people from "intentionally ramming our car".