Downward green arrow: this lane is open.

Purpose and student action

Identify the signal shape, colour and intended users, then apply the source rule and priority obligations.

Read · decide · act

1. Identify the light intended for your lane and vehicle; public-transport signals are distinct.
2. Observe the stop line and anticipate changes without accelerating to beat them.
3. Green does not authorise blocking a junction or ignoring people still lawfully crossing.

Source documents

Downward green arrow: this lane is open.

Coverage refers to this dated source catalogue, not every local sign or all Belgian legislation. Variants and reference examples are counted separately.