Train noise mitigation is back on the table for the Carroll City Council. For more than two decades, this issue has been on the top of many Carroll residents’ wish lists. During Monday’s meeting, Bolton and Menk, Inc. representatives joined city officials for a work session on the feasibility of making Carroll a quiet zone, which would significantly reduce how often train horns are blown as locomotives pass through town. Many residents are familiar with the quiet zone debate, as it has been a discussion since the turn of the millennium. Principal engineer, Greg Broussard, explains the purpose for those unfamiliar with the designation.