Choking back exhaust fumes, 22-year-old Rihana Saif stands at a traffic signal in India's capital New Delhi, holding a sign mounted on a bamboo stick imploring motorists to turn their engines off.

Renault will stop assembling new cars at its Flins factory outside Paris and turn the site into a research, recycling and repair centre by 2024 in a move set to save full-time jobs at the plant, the ...

These symbols, often called "idiot lights," are aimed at being easy to understand. But for many drivers, young and old alike, it's not that easy.