A system comprising a computer including a processor and a memory, the memory including instructions such that the processor is programmed to: receive at least one of expected upcoming traffic behavior or actual upcoming traffic behavior corresponding to an upcoming segment of a roadway being traversed by a vehicle; adjust a radiator hysteresis timer based on the expected upcoming traffic behavior or the actual upcoming traffic behavior; and transmit a control signal to an actuator to actuate a radiator fan based on the adjusted radiator hysteresis timer.