AbstractPEAS is a Fortran IV model to simulate a set-up for transport of patients (emergencies and not-emergencies) in an urban or rural area. The set-up includes several hospitals, vehicle stations, vehicle types (ambulance, parame die unit, etc.) and crews. The model allows radio dispatch of vehicles from any point in the area, as well as an emee gency-speed for vehicles serving an emergency call. The o- perating area is modelled as a network where the arcs repre sent the routes used for transport and the nodes are hospitals, stations or centres of geographical gravity of calls.Results of the simulation include statements about:––level of covering: distribution of response times for e- mergencies and for non-emergencies, loading factor of vehicles and working time of crews. The model calculates all these points for the whole area and for given sub-a^ reas: global and local levels of covering––costs: annual costs and costs per call (including expenses for buildings, personnel and vehicles) for each type of call.To find a good arrangement for a set-up, the model answers such questions as: What would happen to ambulance covering and to costs if ...?It is possible to analyse the influence of:––vehicle stations (number, location, operating duties, districts)––hospitals (ditto)––vehicles (number, types, position)––crews (ditto, working hours)