noun
sign; signboard; display board
Refers to a physical board or panel that displays information, such as roadside signs, park notices, or public information boards.
公園の入り口に標示板が立っている。
There is a signboard at the entrance of the park.
道路脇の標示板に速度制限が書いてある。
The speed limit is written on the roadside sign.
標識 refers to a sign or marker, often used for traffic signs or indicators, and is more abstract than 標示板, which emphasizes the physical board.
Compound of 標示 (hyōji, 'indication, display') and 板 (ban, 'board'). The exact historical derivation is uncertain, but the word follows a common pattern for naming physical display panels.