No person has any right of ingress or egress to or from abutting lands onto or across any controlled access facility, except at such designated points at which access is permitted. In addition, access spacing on thoroughfares is as follows: (i) intersection spacing – 600 foot minimum; (ii) entrance spacing – 300 foot minimum; (iii) separation of entrance from intersection – 150 foot minimum.
(Code of Iowa, Sec. 306A.4)