"Ambulances." . . "Computer Programs." . . "Emergency Vehicles." . . . . "Police Vehicles." . . "Travel Time/ Trip Duration." . . "Travel Demand/ Travel Behavior." . . "Traffic Speed." . . . . . . . . "Determining the travel characteristics of emergency service vehicles" . "Determining the travel characteristics of emergency service vehicles"@en . . . . . . . . . . . . . . . . . . . . . . . . "Trip Distance." . . "Atmospheric Conditions." . . "Fire Trucks." . . "Time of Day." . . "Transportation-Supply Demand Modeling." . . "Regression." . .