(1) The Board of Surveyors shall adopt and keep on file plans and cross sections of streets showing the locations and widths of sidewalks, roadways, and planting spaces.

(2) No improvement of any kind, for which a location is shown upon such plans and cross sections, or upon the plans filed as provided for in § 11-301(4), shall be made in any street except in the location so provided, and no persons shall place any such improvements in any street without first obtaining the location and the lines and grades from the district surveyor and regulator.

(3) If the owner of a property fails to conform to such plans in the setting of a curb, the laying of sidewalks, or the making of other improvements, for the cost of which the owner is liable, the Department of Streets shall notify the owner to reconstruct the improvements in accordance with the approved plan within 30 days. If the notice is not complied with, the improvement shall be reconstructed by the Department of Streets, itself or by contract, and the cost charged against the abutting property and collected by the City, or by the contractor as provided in Chapter 11-500.

(4) Whenever any street is to be improved and in the judgment of the Board of Surveyors a temporary reduction in the width of said roadway is desirable, a plan shall be prepared showing the proposed widths and locations of roadways, sidewalks, and other surface improvements, including divisor's or median strips, in accordance with a standard cross-section for a street of that width on file with the Board. This plan, upon approval by the Board of Surveyors, shall be filed as a supplement to the records of the confirmed plan, and the new plan shall be followed in making all street improvements.

(5) Whenever, because of an increase in traffic, the roadway of any street previously improved under a supplementary plan as provided in § 11-301(4) shall be required to a greater width than that shown on the supplementary plan, the Board of Surveyors may by resolution direct that the said roadway be widened to the lines as originally confirmed. The date of the resolution shall be placed upon the plan, and as soon as practicable thereafter the Department of Streets shall regrade, reset, curb, pave, or repave, and rebuild inlets on the confirmed lines in accordance with the provisions of Chapter 11-500.