An intuitive traffic-light retro format — Red for blockers, Yellow for caution, Green for smooth sailing — that makes team health instantly visible at a glance.
Drag example cards between columns or try voting to explore the format.
Stop — what's blocking the team? Critical issues that need immediate attention.
Prod database hitting connection limits — needs immediate scaling
Third-party API deprecation — migration not started
Team is one person short critical path
Caution — what needs monitoring? Issues that aren't critical yet but could become Red.
Documentation is falling behind feature development
Test coverage dropped below 60% this sprint
On-call rotation is burning out the senior engineers
Go — what's working well? Practices, tools, and behaviors to maintain.
CI pipeline is fast and reliable
Design-review collaboration is excellent
Sprint planning is well-organized and focused
Use these prompts and example cards to start a focused conversation.
Stop — what's blocking the team? Critical issues that need immediate attention.
Example cards
Keep in mind: Don't list minor annoyances as Red — Yellow exists for that
Caution — what needs monitoring? Issues that aren't critical yet but could become Red.
Example cards
Keep in mind: Don't let Yellow items become chronic — if it's Yellow for 3 sprints, it's really Red
Go — what's working well? Practices, tools, and behaviors to maintain.
Example cards
Keep in mind: Don't skip Green — it's essential for balance
Stoplight takes about 10–20 min. Here's the flow.
Red = blockers, Yellow = caution/warning, Green = smooth sailing. Blameless and honest.
Team adds cards to all three columns. Encourage at least one card per column.
Vote on items. Reds get priority attention — discuss how to unblock.
Focus actions on Reds and Yellows. Greens are good — protect them.
Share a quick summary. If many Reds, schedule a dedicated problem-solving session.
The Stoplight retrospective (also known as Red, Yellow, Green) uses one of the most universally understood visual metaphors: a traffic light. Red means stop — what's blocking the team? Yellow means caution — what needs attention? Green means go — what's working well?
This format's brilliance lies in its intuitive visual nature. Every team member instinctively understands the traffic light metaphor, which means zero onboarding time and immediate participation. The format originated in Lean management and Just-in-Time manufacturing, where shop floor teams used red/yellow/green indicators to signal production line health. It was adapted for Agile retrospectives by facilitators who needed a format that could surface team health signals at a glance.
The psychological advantage of Stoplight is its non-confrontational nature. Team members can signal distress (Red) or concern (Yellow) without having to articulate detailed complaints. For teams with introverted members or power distance dynamics, this low-friction signaling is invaluable. A Red card might just say "API stability" — the team knows what that means without forcing the author to elaborate publicly.
If you like Stoplight, you might also enjoy these formats.
A focused two-column retro format — What Went Well and Needs Better — that balances celebration with honest improvement in the shortest possible time.
A classic three-column retro format that helps teams identify new practices to adopt, unhelpful habits to drop, and winning behaviors to reinforce.
A four-column continuous improvement format — Drop, Add, Keep, Improve — that combines Start/Stop/Continue simplicity with actionable improvement granularity.
An emotion-based retro format that gives team members a safe space to express frustrations, concerns, and wins — building psychological safety and honest communication.
Stoplight (Red, Yellow, Green) uses a traffic light metaphor. Red is blockers, Yellow is caution, Green is what's working. It provides an instant visual health check for any team.
10–20 minutes. It's one of the fastest formats because the metaphor is immediately understood.
Yes — leadership teams benefit from the instant visual health check. A board full of Red is an immediate escalation signal.
Yes — the traffic light metaphor is universal and requires no special context. LetRetro's board makes Red/Yellow/Green signals visible at a glance.
LetRetro automatically tracks column distribution across sprints, giving you a team health trend line.
Celebrate! But also ask: are we being honest? If multiple sprints are all Green, the team may be avoiding difficult conversations.
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