Our project boundary encompasses two blocks with a through-street dividing them (just like fig.12b on page 28 of LEED ND Ref. Guide). Based on project's net area the two intersecctions inside LEED boundary are enough to meet 140 inters per sq.mile requirement. However, surrounding neighborhood is composed by large blocks (1078ft X 420ft average) and we aren't able to meet the other part of prerequisite "one through-street intersecting or terminating at the project boundary every 800ft." I wonder if my case falls under exception described on page 179 "If a project shares a boundary with a previously developed parcel that does not have a through-street every 800ft, an exemption is allowed: The project does not need to provide a through connection because no connection can be made" once adopting surrounding streets will not solve our problem and the area within 1/2mile is completely developed with buldings on it (including our project site).