For this case which occurred ~ 17:30 p.m. ,guard tried to call drivers as above step . We have the problem to find the driver after office hours. After Oct 10,2014 we lost 3-4 volunteer drivers and Facility team has only 2 staffs for each shift which can not leave working area to support emergency car. So guard has to call external taxi to support this case and may take time to find taxi during that time . We are trying to find more volunteer drivers to support emergency car to support our employees. Your sharing ideas on this are very welcomed.