Such crossing shall be supported by such permanent and proper structures and fixtures, and shall be controlled by such customary and approved appliances, methods, and regulations as will best secure the safe passage and transportation of persons and property at and along the state highway or county road along the line of the public service corporation, and will not be injurious to the highway or road to be crossed. If an underpass or overhead or grade crossing be provided for the state highway or county road, it shall be constructed with proper approaches and proper drainage of the approaches and underpass or overhead or grade crossing, so that the road therein may be safe, convenient and dry.