Upload
ownah
View
83
Download
0
Tags:
Embed Size (px)
DESCRIPTION
Safety: Blind Spots, Proximity Warning & Camera Systems – An Overview. Innovations and Best Practices to Improve Work Zone Safety. Outline. Work Zone Statistics Motorist challenges Construction site challenges Intrusion Devices Blind Spots / Camera Systems Work Zone Safety Best Practices - PowerPoint PPT Presentation
Citation preview
Innovations and Best Practices to Improve Work
Zone Safety
Safety: Blind Spots, Proximity Warning & Camera Systems – An Overview
Outline
• Work Zone Statistics• Motorist challenges• Construction site challenges
• Intrusion Devices• Blind Spots / Camera Systems• Work Zone Safety Best Practices
• Internal Traffic Control Plans
Fatalities in Motor Vehicle Traffic Crashes in 2007
• 2007 total – 40,224• 2007 Work Zone total – 835
• Roughly 10% of all fatalities are actual workers
• Most of the fatalities are a result of Construction vehicles and equipment, not the traveling public.
• Colorado – 2007• 541 total fatalities from crashes• 13 Work Zone related fatalities
Workers on Foot – Construction Vehicle Only
0 20 40 60 80 100 120
Other vehicle/other source
Other machine
Other/unspec truck
Excavating machine
Grading/surfacing machine
Semi-truck
Dump truck
Veh
icle
Deaths
Source: Census of Fatal Occupational Injuries, special research file
Deaths by Construction Vehicle Type
41%
14.3%
14%
7.7%
10.4%
6.5%
6%
Understanding the motoring public
• The highway transportation system is composed of three basic elements:• Roadway,• Vehicle, and• Driver.
• A high degree of control is exercised over the first two elements.
Understanding the motoring public
• Drivers, however, must be accepted pretty much “as they are.”
Driver characteristics and limitations
• Drivers over rate their ability
• Drivers attitudes vary• Physical ability varies
Intrusion Alarms
Work Zone Safety
Intrusion Alarm• SonoBlaster Dual Alert Work Zone
Intrusion Alarm• Impact activated safety device• 125 dB horn blast upon impact• Notify workers, alert the driver
Intrusion Alarm
• SAFETY-LINE Intrusion Alarm System• Dual beam system• Can be linked together – one mile or
more• Broken beam = 125 dB siren
Intrusion Alarm
• Intellistrobe AFAD Lane Intrusion Safety System.• Auto Flagger / Lane Intrusion Alarm
Device
BLIND SPOTS
Work Zone Safety
Definition of Blind Spot
• A blind spot is the area around a vehicle or piece of construction equipment that is not visible to the operators, either by direct line-of-sight or indirectly by use of internal and external mirrors.
Problem• Workers must be near moving
equipment• Blind areas around equipment extensive
Vehicle Blind Spot Hazards
• Running over people
• Running over materials
• Striking other equipment
and vehicles
• Rollovers
• Contact with utilities
Blind Area (Polar Grid Method)
Not Visible to Operator
Visible in mirrors only
Systems Selected for Long Term Tests with
WSDOT
Radar Systems
PreviewPreco
Electronics
Guardian Alert
Guardian Alert Radar System Dump and Bridge Insp. Trucks
Guardian Alert Radar System Dump and Bridge Insp. Trucks
Results:Small and easy to mount
Does not detect people very well
Good detection of other objects
Camera Systems
Clarion heated camera
Intec camera
Camera Systems
• Mining Industry Example
Intec Camera SystemDump Truck
• Small camera that can mount on side of dump box
• Size of 2 inch cube
Intec Camera SystemDump Truck
Results: Small size allowed for good mounting location Most drivers found it useful Reliable operation during 5 month test Would have problems in winter
Camera and Radar Sanding Truck
• Two systems selected for winter tests on a sanding truck: Preco’s Preview
radar Clarion heated
camera with shield
• 2 month test (Dec. – Jan.) in harsh conditions
Camera
Radar
Camera and Radar Sanding Truck
Camera and Radar Sanding Truck
Results:• Camera and radar
effective in dry conditions
• Problems in snow, rain: Snow, ice, mud build-
up after 5 miles Camera lens shield
froze then broke Radar false alarms
from snow and mud on antenna
• Improvements needed!
Ultrasonic System
Sensors
Hindsight 20/20
Hindsight SonarDump Truck
Ultrasonic-based system
Hindsight Sonar Dump Truck
Results: Drivers said system is reliable in most
conditions
Concerned about detection range of 8 ft
Some false alarms in heavy dust
Constant false alarms when trailer is
being pulled (optional trailer system
needed)
Conclusions• Sensor systems (radar, sonar, infrared):
False alarms are possible Nuisance alarms can be numerous in crowded
work areas• Camera systems:
Provide view of blind area Do not alarm so potential collision may go
unnoticed May not work in winter conditions Good solution for crowded work zones during
warmer months• A combination of sensors and a camera
may be best solution for warmer months Alarm prompts driver to check video Video allows driver to check source of alarm
Other Ideas
The TagView System
Rear Vision Camera System
• 3rd EYE• 7” color or B/W flat screen• 2 camera capacity• Compact Heavy Duty Color Camera• Built in microphone• shock and vibration resistant• LED night vision function
Best Practices
Work Zone Safety
Stop-Signals
• Stop Light Signal Trailer System
Work Zone Safety - UTC
• Best Practice• Uniform Traffic
Control
• Making it better:• Provide Work Zone
and Temporary Traffic Control Training
• Give them room to work
Work Zone Safety – Public Information
• Public Information and Outreach
• Making it better:• Clear detour
routes• Give them enough
lead time• Establish roles and
responsibilities before the project begins.
Work Zone Safety – Public Information
• Do not needlessly burden the motorist.• Clear, credible messages• Public perception is reality
Work Zone Safety – Physical Barriers
• Physical Barriers for worker protection
• Making it better:• Consider all options
for protection• Do not get
complacent
Work Zone Safety
• Speed Reduction
Work Zone Safety - Training
• Training Options
• Work Zone Awareness• ARTBA OSHA 10
Internal Traffic Control Plans
Why Develop an Internal Traffic Control Plan?
• Coordinate vehicle/equipment movement inside the work zone
• Limit exposure of workers on foot to construction traffic
• Reduce hazards for equipment operators
Proposed Definition of Internal Traffic Control Plans (ITCP)
“STRATEGIES TO CONTROL THE FLOW OF CONSTRUCTION WORKERS, VEHICLES AND
EQUIPMENT INSIDE THE WORKZONE”
ITCP Principles of Safe Construction Traffic Control
• Reducing the need to back up equipment
• Limiting access points to work zones
• Establishing pedestrian-free areas where possible
• Establishing work zone layouts commensurate with
type of equipment
• Providing signs within the work zone to give
guidance to pedestrians, equipment and trucks
• Designing buffer spaces to protect pedestrians
from errant vehicles or work zone equipment
ITCP Components
• Notes Page• Safety Points• Personnel• Equipment
• Legend• Method Specific
• Work Area Diagrams• Dimensions• Movement Flow• Workzone Limits• Signage
Safety Points: No workers in traffic zone Spotter uses hands free radio to talk
to trucks No workers on foot between a backing
truck and the paver No rollers within 50 feet of the back
of the paver Inspectors remain away from paving
train and notify spotter before obtaining samples
Internal Traffic Control Plan
Internal Traffic Control PlansPaving Model Plan – Traffic Adjacent
Review TCP (for Work Zones) and Other
Contract Documents
Determine Site Specific ITCP Needs
Draw Work Space
Add Pedestrian and Equipment Paths
Locate Staging Areas
Prepare Notes and Plan
Steps in Preparation of ITCPs
Key Elements of a Vehicle Backing Safety Program
• Equipment designed to minimize blind areas
• Equipment inspections/preventative
maintenance
• Layout work areas to avoid backing
• Use of spotters
• Training for operators and workers on foot
• Use of high visibility vests
• Use of other backing safety devices
(engineering controls)
Work Zone Safety
• Thank you and stay safe!