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 sizes and dimensions.
C. 
Needs for convenient access, circulation, control and safety of street traffic.
D. 
Limitations and opportunities of topography.
Pedestrian crosswalks not less than 10 feet wide shall be required where deemed essential to provide circulation or access to schools, playgrounds, shopping centers, transportation and other community facilities.