(b) Upon a roadway which is divided into 3
lanes and provides for two - way movement of traffic, a vehicle shall not be driven in the center
lane except when overtaking and passing another vehicle traveling in the same direction when such center
lane is clear of traffic within a safe distance, or in preparation for making a left
turn or where such center
lane is at the time allocated exclusively to traffic moving in the same direction that the vehicle is proceeding and such allocation is
designated by official traffic control devices.