It is an arrow board designated by the Road Public Corporation.
Specifications
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Material: Galvalume (composite plate of iron and aluminum)
Size: (Large) 450 x 900mm (plate surface)
Weight: Approximately 11kg
Both sides are fully reflective, the arrow can point either right or left, designated by the Japan Highway Public Corporation.
For arrow plate series, there might be slight differences in the shape depending on which production lot they have been produced. Thank you for your cooperation.