The Pedestrian Use 5006 Sign will state very clearly that pedestrians are required to use a certain route. This will most likely be as an attempt to try to ensure that they are kept safe and out of the way of vehicles.
The sign has the symbol for a man walking and would be instantly recognisable to all people. As an added security feature, it will even glow in the dark as it is Jalite AAA photoluminescent.
Fixing requires anything as simple as sticky pads, 'No-nails' type adhesive or double-sided tape.