Responding to concerns from the City Council about the large number of double utility poles in Woburn, NStar plans to schedule a meeting of all the utilities using the poles to address the issue. Aldermen raised questions about double poles — locations where a new utility pole has been installed but the old one remains — to NStar representatives following a recent council hearing on the utility’s request to install three new poles, according to City Clerk William Campbell. He said Bill Zamparelli, a community relations representative for NStar, told the council the meeting would look for ways to reduce the numbers of double poles. Campbell said utility poles in the city are owned either by NStar or Verizon, or jointly by the two companies, but NStar takes the lead in installing and removing the poles. He said the aldermen’s concerns about double poles include that they pose a safety risk by blocking the line of sight and narrowing sidewalks, and that they are unattractive.