A nearly half a million dollars will be spent to upgrade sidewalks in part of Danbury.  According to an announcement on the City website, Danbury will spend $450,000 to improve the area along Balmforth Avenue.  Handicapped ramps and code-complaint pedestrian control signals are planned, along with new crosswalks at the intersection with Osborne Street.  A federal Community Development Block Grant will cover the cost.  A Danbury-based company has been selected to complete the work between Osborne and North streets.  Tree stumps must be removed. The existing concrete sidewalks and driveway aprons will be demolished and replaced. Traffic flow may be affected once work begins.