How do autonomous vehicles interpret traffic signs and signals?

Example Answer

I would separate detecting a sign or signal, recognizing its state, determining whether it applies to our lane and planning the required response. A clear red light on a neighboring approach must not be treated as our signal. Use temporal observations and relevant map context, while handling ambiguity and stale map data. The traffic-rule policy should be validated for the operating area; recognizing signs does not justify live reinforcement learning of legal behavior.

Make it your own

Illustrative cases: red light for an adjacent lane, an occluded signal, a temporary sign and a disagreement between the map and current camera observation.

Why this works

Class accuracy alone misses applicability errors. Follow-up: what permitted behavior should occur when the relevant signal state cannot be established?

Sources: NHTSA ADS safety guidance, scikit-learn model evaluation.