Block lengths and width or acreage within bounding roads shall be such as to accommodate the size of lot required in the area as hereinafter stated, and to provide for convenient access, circulation control and safety of street traffic.

In blocks over 1,000 feet long, pedestrian crosswalks may be required in locations deemed necessary by the Planning Board. Such walkways shall be 10 feet wide and shall be straight from street to street.

For commercial, group housing or industrial use, blocks shall be sufficient to meet all area and yard requirements for such use.