An informational meeting is being held in Redding tonight to give an overview of train operations and horn protocol.  A summary of noise audits and noise complaint investigations will be discussed by representatives from Metro North and the state Department of Transportation.  Safety improvements planned at railroad crossings in Redding will also be discussed.  The informational event is from 7:30 to 10:30pm at the Redding Community Center.  A forum called Train Horn Abuse Danbury Line was held in August.