A suppression motion was properly denied where police had cause to stop a driver for changing lanes without signaling. A police officer followed Logsdon because he exited from a gas station, crossed six lanes of a seven-lane street, and proceeded forward in the middle lane. When Logsdon then moved to the far right lane without signaling, the officer stopped him for a violation of Vehicle Code section 22107, which prohibits changing lanes without signaling. Logsdon was then arrested for driving under the influence of alcohol with three prior convictions. On appeal following his plea, Logsdon challenged the stop and detention, arguing that since there was no other traffic which was affected by the maneuver, no signal was required to change lanes safely. The appellate court rejected the argument and found that Logsdon’s suppression motion had been properly denied. Changing from the middle lane to the far right lane without signaling could have affected the sole driver driving behind Logsdon. Section 22107 is clear in that its provisions apply to any vehicle which may be affected, not just those which were actually affected.