On fully actuated signals, or semi-actuated traffic signals, pressing the button to cross a smaller side street will cause an "instant walk signal". In most states, drivers only have to wait until the pedestrian has finished crossing the half of the crosswalk that the driver is driving on, after which the driver may proceed. However, in some states (such as Utah), if the driver is in a school zone with the lights flashing, the driver must wait until the entire crosswalk is clear before he may proceed.