Construction site situations

"A vehicle may not with any wheel drive on an obstruction marking or across a solid line. If particular caution is observed, however, exceptions can be made from this rule if it is required for the vehicle to be able to pass an obstruction on the road."

Driver license handbook

In the following scenario all the road markings have been removed. The lane has also been changed into the oncoming traffic lane. Thus construction signs always takes priority even if it means that you will break some road rules such as driving over a solid line