U.S. Sen. Kirsten Gillibrand on Monday said she will support the construction of a street-level community grid to replace the elevated portion of Interstate 81 in Syracuse.Until now, Gillibrand declined to take a position on the issue, saying it was up to Central New Yorkers to choose the best option for replacing the 1.4-mile viaduct that cuts through the heart of Syracuse.Gillibrand, D-N.Y., said during a visit to Syracuse on Monday that she decided to speak out after discussions with community stakeholders who favor the grid over a tunnel or new elevated highway."Given where the stakeholders are -- and given what...