Under the bill, a township board that desired to be a part of the speed limit-setting process with respect to county highways within that township would have to give written notice to the county road commission, or if none, the county board of commissioners. If the county road commission, the township board, and the Director of the Department determined upon the basis of an engineering and traffic investigation that the speed of vehicular traffic on a county highway was greater or less than was reasonable or safe under the conditions found to exist at an intersection or other place or upon a part of the highway, then the officials, by a majority vote, could establish a reasonable and safe maximum or minimum speed limit at that intersection or on that county highway that would be effective at the times determined, when appropriate signs giving notice of the speed limit were erected at the intersection or other place or part of the highway.