MIDDLEBURY — At its Tuesday meeting, the Middlebury selectboard received an update on the downtown Middlebury rail bridges project. Jim Gish, community liaison for the $52 million project, said he will soon release results of a recent survey on local folks’ reactions to the new temporary bridges on Merchants Row and Main Street. Gish said 250 people responded to the report, with a majority expressing positive reactions to the construction and related communication this past summer.