⁴ᴷ⁶⁰ Portuguese Railway Signalling: Shunting Signal

The lonely white aspect authorizes train drivers to proceed with shunting movements.
The signal image used is publicly available in the "REGULAMENTO GERAL DE SEGURANÇA - RGS II" (Railway Rule Book - in Portuguese language only).
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[@doisti-kun]

o vídeo está muito fixe! adoro esta série de vídeos 😁😁