It is recognized that the owner, in creating nonresidential or commercial subdivisions, faces problems of lot design not normally encountered in residential subdivisions. For this reason, the initial emphasis of the Planning Board shall be on street layout and block arrangement. Generally, the owner shall follow the regular procedures outlined in Articles III and IV of this chapter and also show the entire tract to be subdivided with necessary improvements and as many tracts as he desires, but at least two. Thereafter, as prospective buyers express interest in lots sized to their requirements, the owner may submit to the Planning Board an amendment to the approved final subdivision plat for consideration. Regular procedural requirements of the Planning Board following receipt of a final subdivision plat shall apply.
In addition to the principles and standards of these regulations which are appropriate to the planning of all subdivisions, the subdivider shall demonstrate to the satisfaction of the Planning Board that the street, parcel and block pattern proposed is specifically adapted to the uses anticipated and takes into account other uses in the vicinity. The following principles and standards will be observed:
A. 
Suitable layout. Proposed nonresidential or commercial street layout, blocks and parcels shall be suitable in area and dimension to the types of development anticipated.
B. 
Nonresidential traffic streets. Streets carrying nonresidential traffic, especially truck traffic, shall not be extended to the boundaries of adjacent existing or potential residential areas, nor connected to streets intended primarily for residential traffic. They shall be connected to arterial or collector streets in such a way that the number of intersections with arterials and collectors will be minimized.
C. 
Free flow of vehicular traffic abutting commercial developments.
(1) 
Street rights-of-way and pavement shall be adequate to accommodate the type and volume of traffic anticipated to be generated thereon. Curb radii at intersections shall be at least 50 feet. Curb radii at driveways shall be at least 25 feet.
(2) 
In front of areas zoned and designated for commercial use or where a zoning change permits actual or contemplated commercial use, the street width shall be increased by such amount on each side as the Planning Board deems necessary to assure free flow of through traffic without interference by turning vehicles.
D. 
Service streets or loading space in commercial developments. Paved rear service streets of not less than 20 feet in width, or in lieu thereof adequate off-street loading space suitably surfaced, shall be provided in connection with lots designed for commercial use.
E. 
Off-street parking. The owner shall ensure that the nonresidential subdivision shall be self-sufficient in providing necessary off-street parking. Parking self-sufficiency must also be a requirement of individual lots.
F. 
Special physical improvements. With respect to physical improvements, special requirements may be imposed within a nonresidential subdivision by the Planning Board with the advice of the Town Engineer.