A 90 day trial is under way in Brookfield and New Milford of a "Cooperative Ambulance". The vehicle has been placed into service to cover back up calls in both neighboring towns. The so-called "Tac-car" is staffed from Monday through Friday from 10am to 6pm, during high incidence hours in Brookfield and New Milford. Fire Department officials say it rotates week to week depending on which station is manned. A staging area on Danbury Road will also be used when the neighboring community has a call. Brookfield Volunteer Fire Company and New Milford Community Ambulance says sharing the asset allows both towns to have a staffed back up ambulance at half the cost.