EM USA Terms and Definitions - FEMA

91) what are blue color signs used for? 92) explain how the 3-second following rule works. 93) what do flashing red lights mean? 94) what does a driv. er's arm signal mean that is straight out the window. 95) can you pass a vehicle with a solid yellow line on your side? 96) what does a drivers arm signal mean that is pointing upwards out the ... ................
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