VIRTUAL TOUR -- Residential site -- 735 Homer Ave, Palo Alto -- UNIT PAVERS AND GRASSPAVE It was thought that the ruts formed because the area was sodded rather than seeded, which created a layer of mud above the plastic matrix that was supposed to distribute weight and prevent rutting. So the sod was removed and the area seeded, with care taken to leave the soil level just at the top of the plastic matrix. 4/17/06