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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. 

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## TRAFFIC OFFICERS 

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. 

## QUESTIONS 

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: 

• 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? 

• What must you do at a STOP sign? 

• What color and shape is a railroad crossing warning sign? 

• 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 does it indicate if an edge line angles in toward the center of the road? 

• What do each of these lines indicate: one broken, one solid, double solid, solid and broken together? 

• If an intersection has crosswalk lines but no STOP line, where must you stop for a red light at that intersection? 

• What type of pavement marking shows you which lane you must use for a turn? 

• Which of the following must you obey over the other three: red light, flashing red light, STOP sign, police officer? 

