Diamond Symbol:  This symbol indicates the lane  is reserved lanes for buses, HOV (High-Occupan- cy Vehicles) like car-pools and van-pools, bicycles  or other special vehicles. You cannot enter and  use these lanes unless your vehicle complies with  the occupancy or other requirements indicated  by signs for the times the special conditions are  in effect. When used to designate reserved lanes  on city streets, sections of the solid white line that  separates the diamond lanes from the normal  lanes can be replaced by broken white lines. In  these locations, non-HOV can enter the HOV lane  if they make a right turn at the next intersection.  Bus lanes and HOV lanes are to promote the  most efficient use of limited street and highway  capacity. They assure that vehicles with the highest importance move the fastest.  Directions given by traffic officers take prece- dence over signs, signals or pavement markings.  If a traffic officer signals you to stop at a green  light, for example, you must stop. If an officer sig- nals you to drive through a red light or stop sign,  you must do it. Among the persons authorized to direct traffic  are police officers, fire police, highway work area  flag persons and school crossing persons. Before you move on to Chapter 5, make sure  you can identify the signs in this chapter and  know what they mean. Also, make sure you can  answer these questions: • Which of the following must you obey over  the other three: red light, flashing red light,  STOP sign, police officer? • What type of pavement marking shows you  which lane you must use for a turn? • If an intersection has crosswalk lines but no  STOP line, where must you stop for a red  light at that intersection? • What do each of these lines indicate: one  broken, one solid, double solid, solid and  broken together? • What does it indicate if an edge line angles  in toward the center of the road? • What must you do when you encounter each  of the following: a flashing red light, flashing  yellow light, steady yellow light, a red light  with a green arrow? • What color and shape is a railroad crossing  warning sign? • What must you do at a STOP sign? QUESTIONS TRAFFIC OFFICERS • A regulation sign is normally what shape? • What is the normal color and shape of a  warning sign? • What color and shape is a destination sign? 32 | Driver’s Manual