The Danbury Zoning Commission has signed off on a used car dealer opening near exit 6 off I-84.  Blasius of Danbury previously received approval from Planning for a flood plain permit to locate a new office, showroom and display lot on four properties off Walnut Street.  Some Zoning Commission members were concerned about big trucks dropping off cars because it's a narrow roadway.  The applicant told the Commission that there is nowhere suitable to drop off cars, but they have a location about four miles away.  They'll also service the cars at that location before they are driven over.  The City's engineering department signed off on plans to demolish two of the four buildings and renovate two others.  Plans call for storm drainage improvements and the installation of curbing and sidewalks along Walnut Street and Oakland Avenue.