attended. Have we known that, have we known this is the rule that they're not supposed to leave the horse unattended we would have never agreed to it. Sampson has been retired, and all horse and carriage operations in Central Park have been shut down until Tuesday as part of a safety stand-down called by the Transport Workers Union of America Local 100 union Friday. Drivers are expected to attend meetings that will review safety rules and protocols, including securing and maintaining control of carriage horses at all time, the union said. Mahajan's death has sparked a new wave of calls from animal activists and city lawmakers for an outright ban on horse carriages.