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The Risk of Distracted DrivingThe Risk of Distracted Driving

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Complacency Kills is the old Complacency Kills is the old saying. Then why aren’t you saying. Then why aren’t you wearing your seat belt and wearing your seat belt and

watching your speed?watching your speed?

What are the safety precautions to be followed What are the safety precautions to be followed prior to and during driving?prior to and during driving?

SeatsRadioGas

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What distance will your vehicle travel before it What distance will your vehicle travel before it comes to a complete stop at 70 mph?comes to a complete stop at 70 mph?

Reactionary DistanceBraking distanceTotal Distance

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What is Reactionary Distance and how much What is Reactionary Distance and how much time does it consume? time does it consume?

PFC = Peak Friction CoefficientPFC = Peak Friction Coefficient04/20/23

5

Table II—Stopping Distance in Feet Vehicle speed in miles per hour

Service brake Emergency brake

PFC 0.9 PFC 0.9 PFC 0.9 PFC 0.9 PFC 0.9 PFC 0.9 PFC 0.9 PFC 0.9

(1) (2) (3) (4) (5) (6) (7) (8)20 32 35 32 35 38 30 83 8525 49 54 45 54 59 43 123 13130 70 78 65 78 84 61 170 18635 96 106 89 106 114 84 225 25040 125 138 114 138 149 108 288 32545 158 175 144 175 189 136 358 40950 195 216 176 216 233 166 435 50455 236 261 212 261 281 199 520 60860 280 310 250 310 335 235 613 720(1) Loaded and Unloaded Buses.

(2) Loaded Single-Unit Trucks.

(3) Loaded Tractors with Two Axles; or with Three Axles and a GVWR of 70,000 lbs. or less; or with Four or More Axles and a GVWR of 85,000 lbs. or less. Tested with an Unbraked Control Trailer.

(4) Loaded Tractors with Three Axles and a GVWR greater than 70,000 lbs.; or with Four or More Axles and a GVWR greater than 85,000 lbs. Tested with an Unbraked Control Trailer.

(5) Unloaded Single-Unit Trucks.

(6) Unloaded Tractors (Bobtail).

(7) All Vehicles except Tractors, Loaded and Unloaded.

(8) Unloaded Tractors (Bobtail).

What distance does your vehicle travel at 20, What distance does your vehicle travel at 20, 40, 60, 70, and 100 mph?40, 60, 70, and 100 mph?

Have you ever thought about that distance? Formula 1.466 x your speed = feet per second 20 mph = 29.32 feet per sec. 40 mph = 58.64 feet per sec. 60 mph = 87.96 feet per sec. 70 mph = 102.62 feet per sec. 100 mph = 146.6 feet per sec. So every 4 seconds at 60 mph you have traveled

351.84 feet over the length of a football field. Keep 4 seconds in mind for later.

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Why is it important to know the distance you are Why is it important to know the distance you are traveling? traveling?

It enables us to be more effective at threat evaluation, stopping distance, collision avoidance, etc…

At 20 mph you are traveling 29.32 feet per second and it takes you .75 of a second to react how much distance have you covered?

15 feet at 20 mph, the child stepped out at the front of a car and you were 1.5 car lengths away when the child stepped out are you able to stop prior to hitting the child?

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How far in front of your vehicle do the vehicle’s How far in front of your vehicle do the vehicle’s low beams project out on an average?low beams project out on an average?

So we stated earlier that a vehicle moving 70 mph travels 102.62 feet per second. On a good day your lights project out between 150 to 200 feet, doesn’t leave much time if something bad happens. So if you are on the low end 150 feet and you are moving 102.62 feet per second there is only about 47 feet left to react in, is that enough.

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How far in front of your vehicle do the vehicle’s How far in front of your vehicle do the vehicle’s high beams project out on an average?high beams project out on an average?

So we stated earlier that a vehicle moving 70 mph travels 102.62 feet per second. On a good day you lights project out between 250 to 300 feet, doesn’t leave much time is something bad happens. So if you are on the low end 150 feet and you are moving 102.62 feet per second there is only about 47 feet left to react in, is that enough.

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What is the most common night time driving What is the most common night time driving error?error?

Over driving headlights.

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When we are driving how do we receive most of When we are driving how do we receive most of the information that we are processing? the information that we are processing?

Sight90%

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How long are your eyes off the road when you How long are your eyes off the road when you are texting? (Average time)are texting? (Average time)

4.3 to 4.6 secondsType of driving is distracted drivingList other distractions in the vehicle

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So we stated earlier that a vehicle moving 70 mph travels 102.62 feet per second. If your eyes are off the road for just 4.3 seconds you have traveled 441.26 feet. That is almost 1 and ½ football fields. That is a long time for something to happen. We all have done it.

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If you are involved in collision avoidance If you are involved in collision avoidance where should you be looking?where should you be looking?

Where you want the vehicle to go.

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Where should we be steering during Where should we be steering during collision avoidance most of the time? collision avoidance most of the time?

Where you want the vehicle to go and usually at where the obstacle is coming from vice where it is going.

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SummarySummary

This is a class that could take up to 40 hours to teach with Non Emergency Vehicle Operations Practical’s. This class is designed to get you to think about what you and your vehicle are doing while on the road.

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Questions?Questions?

Comments?

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