Highways authority to regulate traffic when Highway is declared unsafe.

If at any time it appears to the Highways authority that any highway in its division or any portion thereof is or has been rendered unsafe for vehicular traffic or pedestrian traffic by reason of damage or otherwise. it may subject to the provisions contained in section 43 and subject to such conditions as may he prescribed, either close the highway or the portion of it to all traffic or to any class or traffic or regulate the number and speed or weight of the vehicles using such highway.