SERIES OF EVENTS (CHAPTER 2) Flashcards

1
Q

WHAT ARE PRE TRIP EVENTS?

A

POINTS IN TIME OR CONDITIONS THAT EXISIT BEFORE A VEHICLE IS DRIVEN

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2
Q

WHAT ARE TRIP EVENTS?

A

OCCUR DURING THE TIME THAT THE VEHICLE IS DRIVEN UP TO THE COLLISION SEQUENCE OF EVENTS

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3
Q

ARE TRIP EVENTS INCLUDED IN THE “ON SCENE” SERIES OF EVENTS?

A

NO

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4
Q

WHAT IS POINT OF POSSIBLE PERCEPTION?

A

THE POINT ALONG THE TRAVEL PATH WHERE THE HAZARD COULD FIRST BE SEEN BY A DRIVER

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5
Q

WHAT IS POINT OF ACTUAL PERCEPTION?

A

THE POINT ALONG THE TRAVEL PATH WHERE THE DRIVER ACTUALLY DETECTS A HAZARD EXISTS

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6
Q

WHAT IS PERCEPTION DELAY?

A

THE TIME BETWEEN POINT OF POSSIBLE AND ACTUAL PERCEPTION

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7
Q

WHAT IS A REACTION?

A

A VOLUNTARY OR INVOLUNTARY RESPONSE TO A DETECTION OF A HAZARD.

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8
Q

WHAT IS REACTION TIME?

A

THE TIME PERIOD FROM POINT OF ACTUAL PERCEPTION UNTIL THE START OF EVASIVE ACTION

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9
Q

WHAT IS REACTION DISTANCE?

A

THE DISTANCE FROM ACTUAL PERCEPTION TO START OF EVASIVE ACTION

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10
Q

WHAT IS EVASIVE ACTION?

A

THE ACTION(S) TAKEN BY A DRIVER TO AVOID OR MINIMIZE A POTENTIAL COLLISION

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11
Q

WHAT IS POINT OF NO ESCAPE?

A

THE POINT-A PLACE AND TIME- WHICH A CRASH CANNOT BE AVOIDED/PREVENTED

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12
Q

WHAT IS ENCROACHMENT?

A

THE POINT WHERE ONE TRAFFIC UNIT INTRUDES OR INTERFERES WITH THE TRAVEL PATH OF A 2ND TRAFFIC UNIT

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13
Q

WHAT IS POINT OF FIRST CONTACT?

A

THE POINT OF FIRST TOUCH BETWEEN 2 TRAFFIC UNITS

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14
Q

WHAT IS THE IPTM ASSIGNED REACTION TIME FOR DAYLIGHT AND NIGHT TIME?

A

DAYLIGHT- 1.6 SECONDS

NIGHT TIME- 2.5 SECONDS

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15
Q

WHAT IS MAXIMUM ENGAGEMENT?

A

THE POINT AT WHICH THE MAXIMUM PENETRATION HAS BEEN REACHED BETWEEN COLLIDING VEHICLES

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16
Q

WHAT IS SEPARATION

A

THE POINT WHEN COLLIDING TRAFFIC UNITS BEHIN TO DISENGAGE AND NO LONGER INFLUENCE EACH OTHER

17
Q

WHAT POINT OF THE COLLISION DOES SEPARATION OCCUR?

A

IMMEDIATELY AFTER MAXIMUM ENGAGEMENT

18
Q

WHAT IS SECONDARY CONTACT?

A

A 2ND CONTACT GENERALLY IMMEDIATELY AFTER THE FIRST COLLISION EVENT

19
Q

WHAT IS POST-SECONDARY CONTACT?

A

CONTACT THAT OCCURS AFTER SECONDARY CONTACT. IT MAY BE A SEPARATE CRASH COMPLETELY

20
Q

WHAT IS POINT OF FINAL REST?

A

THE POINT WHEN A VEHICLE COMES TO REST AFTER THE CRASH EVENT CONCLUDES BASED ON THE LAWS OF PHYSICS

21
Q

WHAT IS THE DIFFERENCE BETWEEN CONTROLLED AND UNCONTROLLED FINAL REST?

A

WHETHER THE DRIVER MOVED THE VEHICLE UNDER IT’S OWN POWER (STILL DRIVABLE) VS A VEHICLE COMING TO REST DUE TO THE PHYSICS OF THE CRASH.

22
Q

WHICH DIRECTION WILL A VEHICLE SKID IF THE ROADWAY HAS A CROWN?

A

LOW SIDE DUE TO GRAVITY

23
Q

IS IT A YAW IF YOU DONT FIND A CROSSOVER?

A

NO

24
Q

WHAT IS THE CRITICAL SPEED OF A CURVE?

A

THE SPEED THAT IF EXCEEDED, A VEHICLE CAN NO LONGER MAINTAIN THE ARC OR CURVE IN WHICH IT WAS TRAVELING

25
Q

WHEN WOULD BE A GOOD IDEA TO EXAMINE UNDER A VEHICLE?

A

WHEN GOUGE/GROOVES/SCRAPES OR SCRATCHES ARE LOCATED

26
Q

WHICH DIRECTION ARE GOUGE MARKS?

A

THEY START DEEP AND THEN END SHALLOW

27
Q

WHAT ARE SCRUB MARKS?

A

CAUSED BY A LOCKED WHEEL JAMMED AGAINST THE SURFACE BY IMPACT.

(USUALLY SIDEWAYS MOVEMENT LOCATED NEAR THE POINT OF MAXIMUM ENGAGEMENT)

28
Q

ACCELERATION MARKS BEGIN ________ AND END _______

A

BEGIN DARK AND END LIGHT

29
Q

WHAT IS A TIRE PRINT?

A

A PRINT LEFT FROM A TIRE BY ROLLING FROM A MARKING SURFACE LIKE MUD/GRASS ONTO THE ROADWAY