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State of New Hampshire Departments of Education and Safety Division of Program Support. Stopping in Traffic. Driver Education Risk Prevention Curriculum Guide. Stopping in Traffic. First in Line Staggered stop Legal stop Safety stop Point of No Return - PONR. LOS. - PowerPoint PPT Presentation
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Stopping in TrafficStopping in Traffic
Driver Education Risk Prevention Curriculum Guide
Driver Education Risk Prevention Curriculum Guide
State of New Hampshire Departments of Education
and Safety
Division of Program Support
State of New Hampshire Departments of Education
and Safety
Division of Program Support
Stopping in Traffic Stopping in Traffic
First in Line
• Staggered stop
• Legal stop
• Safety stop
• Point of No Return - PONR
First in Line
• Staggered stop
• Legal stop
• Safety stop
• Point of No Return - PONR
Legal Stop Before Stop line, crosswalk, pedestrian zone
Legal Stop Before Stop line, crosswalk, pedestrian zone
LOS
LOS
Safety Stop Front even with curb line
Safety Stop Front even with curb line
LOS
LOS
Staggered Stop See stop line, 15 feetStaggered Stop See stop line, 15 feet
LOS
LOS
How far away from the stop line is the front of our vehicle?
Yes! About 15 feet, a car length.
First in line, inside lane• Minimize Stress • Creates open space for
yourself & others • Extra space others
may require for wide right turns
• Extra space others may use – cutting across yellow when turning left
Staggered Stop Advantages
Staggered Stop Advantages
Review PONRReview PONR
That point at which you can no longer stop without entering an intersection
2 seconds away from the intersection Speed affects length of space consumed
in 2 seconds Faster speed = longer space 20 mph = 30 feet per second 40 mph = 60 feet per second
Point-of-No-Return
Demonstration
&
Student Problem Solving Activity
Your Speed is 30 mph
Do you have time and space to stop?
Yes! Space allows for a gradual stop. Check rear and apply brake without delay.
Your Speed is 30 mph
Have you reached the point of no return?
No! However space may not allow for a gradual stop. Check rear and apply brake without delay.
Make a smooth stop.
Your Speed is 15 mph
Is this the point of no return?
No! However space is short, a hard braking action may be required. Control the rear zone! Make a
smooth, balanced stop.
Your Speed is 20 mph
Do you still have the time and space necessary to stop?
What is your best speed option?
No! We are beyond the point of no return. Check the intersection, if safe proceed through the
intersection without a speed increase
Stopping In a Line of TrafficStopping In a Line of Traffic
• Stop To See Tires
–Advantages
• Monitor Rear Zone for “Sand Barrels”
–What are sand barrels?
What advantages can you come up with?What advantages can you come up with?
AdvantagesAdvantages
• If the front car stalls, you can get around it
• Space creates escape paths
• You have empty space to minimize a rear end impact
• There is space to avoid a skidding crash
“Sand Barrels”“Sand Barrels”
• Inertial Buffers• Strategically
Placed• Slows and
Softens the Force of impact
When Stopping in TrafficWhen Stopping in Traffic
• Vehicles to the rear can and do serve the same purpose
• 30 % of all Intersection Crashes Are Rear End Crashes
• You are vulnerable to high impact rear end forces until there are at least two cars stopped to the rear.
• The more cars stopped to the rear, the less the force of impact will be
When Stopped in TrafficContinue to Monitor the Rear Zone Until at
Least 2 Cars are Stopped Behind You
When Stopped in TrafficContinue to Monitor the Rear Zone Until at
Least 2 Cars are Stopped Behind You
Managing SpaceAnd Stopping in Traffic
Managing SpaceAnd Stopping in Traffic
• See Closed POT – at least 12 seconds away• Check Rear Zone• Try to time arrival into open zone• Communicate to Rear – Tap Brake Lights• Begin Braking Without Delay• Control Rear Zone - adjust speed gradual/keep open
front space• Gradual Approach to Stop Location• Make Smooth Stop• Monitor Rear Until at least 2 cars are stopped in back• With a car in Front – Stop to see tires• With Start-up – Use 2 second delay start
See Closed POT At Least 12 Seconds Away
See Closed POT At Least 12 Seconds Away
What Zone Should You Check next?
Try to Time Your Arrival Into An Open Zone
Try to Time Your Arrival Into An Open Zone
How will communicate with traffic in your rear zone? Yes! Tap brake lights. Then brake without delay.
Control Rear Zone Control Rear Zone
Adjust speed gradually.Will you use light, controlled or hard brake pressure?
Keep Open Front SpaceKeep Open Front Space
Gradual Approach to Stop Location
Gradual Approach to Stop Location
Make Smooth Stop Make Smooth Stop
6 Cars are stopped ahead. How many seconds before each is moving?
Yes! 6 Seconds
Monitor the Rear Zone Until at Least 2 Cars are Stopped Behind You
Monitor the Rear Zone Until at Least 2 Cars are Stopped Behind You
Stop To See Tires Touch the Pavement
Stop To See Tires Touch the Pavement
Delay Start 2 SecondsDelay Start 2 Seconds
Advantages of 2 Seconds Delay Advantages of 2 Seconds Delay
When stopped in a line• Creates open space to front
• Helps avoid being surprised by false starts of others
• Begins the process of creating a 4 second following time
• When stopped first in a line• Allows critical time to search the
intersection for an open path-of-travel
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