D-51a Average speed enforcement

What it means

Marks the start of a section where the average speed of travel is measured (section control). The average over the whole section counts, so slowing down just before the camera achieves nothing.

Legal basis: § 60b of the regulation of the Ministers of Infrastructure and of the Interior and Administration on road signs and signals (Dz.U. 2019 poz. 2310, as amended).

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