local yard_id = "ARC"
if event.train then
    if F.has_rc(yard_id.."_LIGHT_EXIT") then
        F.remove_rc(yard_id.."_LIGHT_EXIT")
        atc_set_ars_disable(false)
        atc_send("SM")
        return
    end
end
F.headshunt_exit(yard_id,true)