89. The Minister of Transport shall not be liable for the following damages:(a) Any damage caused by the fault of a builder or contractor of a road or bridge during the execution of the construction or improvement work entrusted by the Minister of Transport to such builder or contractor;
(b) Any loss or lessening of trade, any depreciation in value of a property and any other inconvenience occasioned by changing the course of a road by the construction or reconstruction of a bridge or by the elimination of a level-crossing.