The sign "Drive on the shoulder" indicates that vehicles are permitted to drive on the shoulder of the road. This is typically intended for situations where the main roadway is congested or blocked, allowing drivers to pull over and bypass obstacles in certain conditions. However, it is crucial to use this sign responsibly, as driving on the shoulder may not be allowed in all situations and could pose safety risks. Always ensure that driving on the shoulder is legally permitted at that specific location and that it does not endanger other road users.