Thus, in an uneven grid of streets, the velocity may vary from block to block in accordance with {HEAD ~ the length} of {TAIL ~ the fastblocks} 
of
Thus , in an uneven grid of streets , the velocity may vary from block to block in accordance with { HEAD ~ the length } of { TAIL ~ the fastblocks }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL