Variable Speed
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 Porter Cable 7336 6 Variable Speed Random Orbit Sander  US $50.00
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 Black Decker Screw Gun 120V needs variable speed switch US $.99
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 Trend T4EK 850 Watt 11 HP Variable Speed Plunge Base Router US $89.99
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Dremel 4000-6/50 120-Volt Variable-Speed Rotary Kit List Price: $259.58 Sale Price: $131.79  |
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The Dremel 4000-6/50 High-Performance Rotary Tool Kit contains the Dremel 4000, which provides the highest performance and the most versatility of all Dremel rotary tools. Powerful, user-friendly, and built to last, this handy little tool helps you complete a range of crafting, hobby, and artisan projects... |
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Toro 51599 Ultra 12 amp Variable-Speed Electric Blower/Vacuum with Metal Impeller List Price: $89.99 Sale Price: $74.97 |
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Powerful and effective, the Toro Ultra 3-in-1 Blower, Vacuum, and Leaf Shredder makes completing yard work fun and easy. With air speeds up to 235 mph, this electric blower nevertheless is lighter, quieter, and cleaner than similar gas blowers... |
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Manual 12V DC Variable Speed controller with Molex connector Sale Price: $7.50 |
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Manual 12V DC Variable Speed controller with Molex connector Designed to work with DC 12V fans. Will fit most DC fans with standard 12V molex 4 Pin connecter. Also works with our Standard 12V LED light Strips with 4pin Molex plugs... |
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Electrician's Technical Reference: Variable Frequency Drives List Price: $111.95 Sale Price: $83.29 |
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The variable frequency drive industry is growing rapidly, and it is now more important than ever for technicians and maintenance personnel to keep VFD installations running smoothly! Part of the Electrician's Technical Reference Series, this field guide is ideal for gaining access to information about variable frequency drives, including how they work, how to apply them, and how to troubleshoot them... |
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Variable Speed Professional "Jeanie Rub" Massager #3401 List Price: $275.95 Sale Price: $164.90 |
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Jeanie rub® master massager - oscillating movement enhances blood circulation and helps calm deep-seated muscular pains lightweight and portable; weighs under 7 lbs. High-quality workmanship defines the industry standard features a premium-grade vinyl pad with die-cast aluminum and powder-coat finish... |
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DeLonghi DHB723 380-Watt Tri-Blade Variable Speed Handblender List Price: $140.00 Sale Price: $85.49 |
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Whether you need to blend a delicious smoothie or thicken a savory soup you can do so with ease by using the De’Longhi Hand Blender with variable speeds. You get powerful, efficient and controllable blending at the touch of a button... |
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Practical Variable Speed Drives and Power Electronics (Practical Professional Books) List Price: $48.95 |
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The essential guide for power engineering and industrial control applications. |
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Oster Clipmaster Variable Speed Large Animal Clipper List Price: $399.99 Sale Price: $218.99 |
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Oster ClipMaster Variable Speed Large Animal Clipping Machine is powerful enough for full-body clipping and precision trimming of horses, cattle, llamas, goats, sheep, hogs and some larger breed dogs. The variable speed feature allows for slower speed clipping of face and legs and faster speed clipping for body and tough areas... |
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JetSPEED NEW VARIABLE SPEED PROFESSIONAL AIR DRYER AIR BLOWER SURFACE DRYER VX6 Sale Price: $46.85 |
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JetSPEED VX6 6-Speed Blower is the best vehicle drying system, ideal for fast drying of cars, boats, RV's, motorcycles, scooters, and just about anything. It makes drying any surface fast and fun. Nothing dries a car or gets water and dust out of crevices faster and easier than the new Chemical Guys JetSEEPD VX6... |
Car Crash Severity and Changes in Speed Rate
The Federal Highway Administration reports evidence that crash risk increases for vehicles traveling much faster or slower than average and is lowest near the average speed of traffic. The occurrence of a large number of crashes involving turning maneuver partly explains the increased risk for motorists traveling slower than average and confirms the importance of safety programs involving turn lanes, access control, grade separation, and other measures to reduce conflicts resulting from large differences in travel speeds. When the consequences of crashes are taken into account, the risk of being involved in an injury crash is lowest for vehicles that travel near the median speed or slower and increases exponentially for motorists traveling much faster. One of the major concerns in studies is the travel speed before the crash. Emerging technology used in mayday, vehicle tracking, and adaptive speed control systems provide the opportunity to accurately and continuously capture travel speed. This technology should be applied in improving our understanding of the relationship between speed, speed variation, and safety.
When a crash occurs, its severity depends on the change in speed of the vehicle at impact. The fatality risk increases with the change in speed to the fourth power. International research indicates the change in injury crashes will be twice the percentage change in speed squared, and fatal crashes will be four times the percentage change in speed. These relationships are based mainly on speed limit and speed changes on high-speed roads. More research is needed to assess their applicability to low-speed urban roads.
In general, changing speed limits on low and moderate speed roads appears to have little or no effect on speed and thus little or no effect on crashes. This suggests that drivers travel at speeds they feel are reasonable and safe for the road and traffic regardless of the posted limit. However, on freeways and other high-speed roads, speed limit increases generally lead to higher speeds and crashes. The change in speed is roughly one-fourth the change in speed limit. Results from international studies suggest that for every 1 mi/h change in speed, injury accidents will change by 5 percent (3 percent for every 1km/h). However there is limited evidence that suggests the net effect of speed limits may be positive on a system wide basis. More research is needed to evaluate the net safety effect of speed limit changes.
Most of the speed related crashes involve speed too fast for conditions. This would suggest that variable speed limits that adjust with traffic and environmental conditions could provide potential benefits.
Despite the large number of references concerning traffic calming, very few reports include results of a systematic evaluation. In many cases traffic volumes as well as speed are reduced. As a result of the traffic diversion, crashes may be migrating to other roads. More research is needed to assess the system wide impacts and permit comparisons to be made among individual as well as combinations of traffic calming measures
About the Author
Attorney James W. Dodson is a Clearwater, Florida personal injury trial lawyer with over 20 years experience representing clients in all types of injury claims including vehicle accidents, fall cases and wrongful death. He is the author of three books offered FREE to consumers as a guide to dealing with accidents and insurance. Visit his website at JWDodsonLaw.com for FREE copies of these books, other articles, videos, news and commentary.
