A) It is not certain what role Hippodamos actually played in this development: he may have been a codifier who took the ideas of others and wrote about them in a theoretical way saying how cities should be laid out.

B) The primary characteristic was the orthogonal or gridiron plan with streets at right angles adapted to function and topography.

C) Regular housing blocks.

D) Large areas set aside for public use: temples - theaters - offices - commercial centers.

E) Wide arterial avenues.

F) Walls that enclose the city but are not necessarily related to the plan.