Sometimes, call buttons work only at some intersections, at certain times of day, or certain periods of the year, such as in New York City or in Boston, Massachusetts. In Boston, some busy intersections are programmed to give a pedestrian cycle during certain times of day (so pushing the button is not necessary) but at off-peak times a button push is required to get a pedestrian cycle. In neighboring Cambridge, a button press is always required if a button is available, though the city prefers to build signals where no button is present and the pedestrian cycle always happens between short car cycles. In both cases the light will not turn immediately, but will wait until the next available pedestrian slot in a pre-determined rotation.