When the County Engineer determines that, during load sensitive periods, vehicles whose gross tire loads exceed those described in this section will seriously damage or destroy a County road, the County Engineer may impose the following limits on vehicle weights, except for authorized emergency vehicles.

The emergency load limitations imposed by this section shall become effective upon the erection and maintenance by the County Engineer of signs designating the load limitations (visible to the operator of a vehicle as he/she enters the restricted area), and shall remain in effect until the load sensitive period ends and such signs are removed by the County Engineer.