AASHTO LRFD Bridge Design Specifications – 2008 Interims Released

April 7-11 is National Workzone Awareness Week (NWZAW) which draws attention to the hazards roadway construction crews face from motorists not heeding safety warnings. For 2006—the last year for which data is available—more than 1,000 died in work zones. Figures for 2007 will be released by the National Work Zone Safety Information Clearinghouse later this year. Motorists are also at risk for not following work zone safety precautions. They may face damage to their vehicles, injuries, and loss of life. For 2006, 614 motorists died in work zone crashes. (Graphic by Caltrans)

Below are a few items to think about the next time you’re driving through a workzone taken from a Caltrans fact sheet. More after the break (sorry for the “Duh” ones, but I didn’t write them). As someone who occasionally works on the road and knows many more people who do, please, please remember to slow down!

• Most injuries and deaths in the Cone Zone are from rear-end collisions.
• If you slow from 65 to 55 mph for one mile, you only lose 10 seconds on your travel time.
• The first cause of death for people aged 16 to 20 is car crashes. Even if you don’t lose your life causing a car crash, it could still cost you your license or a heavy fine.
• If a car’s speed is doubled, the stopping distance is doubled twice over. For example, if a car traveling at 30 mph requires 100 feet to stop, the same car at 60 mph takes not 200 but 400 feet to stop.
• At 60 mph, you’re traveling 88 feet per second. A lot can happen in one second, so give yourself plenty of room to stop in case of an emergency.
• For the 15,000 miles of California highway Caltrans maintains, it must buy 120,000 new cones every year to replace ones run over by careless drivers.

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The North American Steel Sheet Piling Association (NASSPA) has released a Sheet Piling Installation Manual. It has a nice overview of different hammer systems and covers issues such as driving systems and methods, templates, cofferdams, driving corrections, driving assistance and extraction. (Photo courtesy of NASSPA)

NASSPA promotes the use of steel sheet piling through the development and dissemination of technical information. This guide was compiled to assist the designer, contractor, or owner with the construction of steel sheet pile walls.

Download the Steel Sheet Piling Installation Guide – Best Practices

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The November/December issue of ADSC’s excellent magazine is available online. Features in this issue include: Texas Shafts Installs Deep, Battered Drilled Shafts for Dallas Bridges Post Grouted Drilled Shaft Research Part II ADSC’s 2014 DROS […]