(1) leading to roads and parking spaces on the grounds of state institutions to which roads have not been designated by the Legislature; and
(2) roads and parking spaces to serve areas in immediate proximity to a designated highway used for: (a) salt flat races; (b) ski meets; and (c) activities which are promoted for the general welfare.
(a) salt flat races;
(b) ski meets; and
(c) activities which are promoted for the general welfare.