Section 313.36 - Maintenance - limitation in cities1. Primary roads shall be maintained by the department and the cost thereof paid out of the primary road fund. Extensions of primary roads in cities may be maintained by the department and the cost thereof paid out of the primary road fund.2. The total amount of funds expended in any one year on extensions of primary roads in cities shall not exceed thirty-five percent of the primary road fund.C24, §4736; C27, 31, 35, §4775-b29; C39, § 4755.27; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, § 313.36See also §306.10 and 313.21