(1) Fully controlled limited access highways:
(a) No commercial approaches shall be permitted direct access to main roadway but only to frontage roads when these are provided in the access plan or to the crossroads of interchanges outside the limits of full access control.
(b) No common carrier bus stops other than required by law shall be permitted except at locations provided by the state on the interchanges or, in exceptional cases, along the main roadway where pedestrian separation is available.
(c) School bus stops shall not be permitted except as in subparagraph (b) of this subsection.
(d) No mail boxes shall be permitted except on frontage roads.
(e) Pedestrian crossings shall not be permitted at grade.
(2) Partially controlled limited access highways:
(a) No commercial approaches shall be permitted except on frontage roads provided in the access plan or at intersections.
(b) Bus stops for both common carriers and school buses shall not be permitted other than as required by law on either two or four lane highways, except as follows:
(i) At locations of intersections, with necessary lanes to be constructed by the state;
(ii) Where shoulder widening has been provided for mail delivery service;
(iii) For a designated school bus loading zone on the traveled lane or adjacent thereto which has been approved by the department of transportation.
(c) Pedestrian grade crossings will be permitted only where a grade crossing is provided, except that pedestrian crossings will be permitted on two lane highways at mail box locations or at points designated for school children to cross as provided in subparagraph (d) of this subsection.
(d) Pedestrian crossings are prohibited in the immediate vicinity of school bus loading zones which are located adjacent to the traveled way. Pedestrian crossings may be permitted:
(i) On two lane highways not less than one hundred feet from a school bus loading zone adjacent to the traveled lane, if school district and department of transportation personnel determine that stopping in the traveled lane is hazardous.
(ii) On two lane highways at the school bus when stopped on the traveled lane to load or unload passengers and the proper sign and signal lights displayed.
(e) School bus loading zones on partially controlled access highways shall be posted with school bus loading zone signs, in accordance with the latest edition of the Manual on Uniform Traffic Control Devices.
(f) The list of designated school bus loading zones approved by the department of transportation will be kept on file and maintained by the headquarters traffic engineer.
(g) Mail boxes shall be located on frontage roads or at intersections, with the following exceptions for properties which are served by Type A or B approaches:
(i) Mail boxes for Type A or B approaches on a four lane highway shall be located only on the side of the highway on which the approach is provided;
(ii) Mail boxes for Type A or B approaches on a two lane highway shall all be located on that side of the highway which is on the right in the direction of the mail delivery.
(3) Modified control limited access highways:
(a) Commercial approaches to modified controlled limited access highways may be permitted only where and in the manner specifically authorized at the time the plan is established and access rights are obtained.
(b) Bus stops and pedestrian crossings may be permitted as follows:
(i) In rural areas, bus stops and pedestrian crossings shall be subject to the same restrictions as on partial controlled limited access highways.
(ii) In urban areas bus stops for both commercial carriers and school buses may be permitted without restrictions other than those required by law.
(c) Mail boxes may be located adjacent to or opposite all authorized approaches as follows:
(i) Mail boxes on a four-lane highway shall be located only on the side of the highway on which the approach is provided.
(ii) Mail boxes on a two-lane highway shall all be located on that side of the highway which is on the right in the direction of the mail delivery.