The Diamond Street conversion to two-way traffic and proposed improvements to Main Street will be topics for Mansfield City Council tonight. According to Richland Source.com, Council is expected to vote on a bill appropriating $106,000 from the Downtown Improvement Fund to be used as part of the Diamond Street conversion, scheduled to be done this summer. It's also expected to provide first readings on a Main Street Corridor Plan, including authorization of a two-year design and engineering process.