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State Diagram · State

Traffic light (state diagram) — State Diagram

A three-state finite state machine for a traffic signal — Red, Green, Yellow — with timer-driven transitions and a poweroff exit to a final state. Introduces UML initial and final pseudo-states, transition labels, and the cyclic structure that makes state diagrams the right tool for reactive systems.

Tipo Diagramma degli statiStandard OMG UML 2.5.1 §14 + Harel (1987) statechartMotore schematex-stateAggiornato 26/05/2026
Software Lifecycle
Traffic light (state diagram)
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La richiesta

“Draw a traffic light state diagram that starts at Red, changes from Red to Green to Yellow on a timer, returns to Red, and can end when power is turned off.”

Prova alloraAdd a flashing red maintenance state.Change the power-off transition to start from every light state.

Sfoglia tutti i modelli di tipo diagramma degli stati →