The lengths, widths and shapes of blocks shall be determined with due regard to:
A. 
Provision of adequate building sites suitable to the special needs of the type of use contemplated;
B. 
Zoning requirements as to lot size and dimensions;
C. 
Needs for convenient access, circulation, control and safety of street traffic; and
D. 
Limitation and opportunities of topography.
Blocks with lengths exceeding 1,320 feet shall be provided with ten-foot crosswalks and shall not be less than 400 feet.