Traffic Lights is a supplementary signaling system for roleplaying games, developed by Peter Malmberg.
Use a card to signal to your fellow players how you feel about what’s happening—without having to interrupt the flow of the game. The card also functions as a stop button for when you feel that things have gone too far.
The system is simple, intuitive and compatible with all tabletop roleplaying games. Each player gets one card with two sides: one green side and one yellow/red side.
The purpose of Traffic Lights is to allow for clear communication within the gaming group and in that way increase emotional safety for the participants. Compared to other systems like the X-card, the intention is to encourage frequent use of the cards—thereby reducing the taboo of indicating that you’re uncomfortable.