This is likely the result of improperly aligned wheels.
the alignment of a car's wheels is important for many reasons, but one in particular which you asked about is simple safety. when the vehicle you're driving makes noises while moving at low speeds, it could be that something has caused improper or irregular wear on your tires that is causing them to ‘chatter' when driven at speeds below 30 mph. it's possible, too, that this noise could stem from improperly adjusted brakes rubbing against drums or rotors (since they may not be able to move freely), which will only make the temperature of these objects rise even more and this can lead to serious wear withing days or weeks if left unchecked. either way it's important for drivers
