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Asphalt Article May 04, 2015
Crack sealing has been used as a very cost-effective method of pavement preservation for decades.   Crack sealants reduce moisture and debris infiltration into the pavement structure, thereby, improving pavement performance.  During the life of most asphalt concrete pavements, overlays are placed...
Asphalt Article May 04, 2015
Around the country, agencies struggle with tight budgets and contractors struggle with unpredictable material prices in a competitive market.   This is not good for our nation’s highways—they continue to deteriorate—or for our economy. But it has had one benefit: It has created strong partnerships...
Asphalt Article May 04, 2015
NAPA is the trade association charged with representing the asphalt-pavement industry before the U.S. Congress and federal regulatory agencies. Our activities in Congress are guided by two principles: First, we support a robustly funded, multiyear highway bill; also, we act as our industry’s...
Traffic Management News May 04, 2015
The Missouri House of Representatives approved a bill that will allow citizens to vote on the use of red light cameras. House Bill 207, sponsored by State Rep. Paul Curtman, was constructed behind the congressman’s belief that the use of red light cameras should banned in Missouri, erring toward...
Funding News May 04, 2015
Today in “well, we saw this coming” news, Congressman Paul Ryan (R-Wis.) has said that Congressional leaders are working on a short-term $10 billion proposal to fund highway repairs through the end of the year, but a gas tax hike will not be part of the deal.   The Highway Trust Fund will run dry...
Maintenance Article May 01, 2015
There are those who are concerned about invited guests, and others who worry about an uninvited one.   Weather forecasting can ease or mess with the minds of individuals on either end. Brides want their day to be perfect, while public works officials just want to be ready for the day—or night—when...
Safety Article May 01, 2015
When 3M wanted to test a pavement-marking system that could make it easier for drivers to find their way through work zones in dark, rainy weather, the company turned to the Federal Highway Administration’s (FHWA) Highways for LIFE Technology Partnerships Program.   Wet road conditions can make it...
Safety Article May 01, 2015
Priorities for the design of roadways have shifted over the years—from a primary emphasis on increasing capacity to considering the purpose of streets and roads in the context of specific settings (often referred to as context-sensitive design). A technique that has gained popularity in recent...
Safety Article May 01, 2015
Those white and yellow lines on the roadway delineate lanes and orient and guide roadway users, enhancing traffic efficiency, reducing conflict and making navigating easier and more comfortable for travelers.   Most importantly, by helping roadway users navigate properly, those lines help reduce...
Safety Article May 01, 2015
Nontangent roadway sections present a unique challenge for pavements.   The pavement surface must satisfy the necessary friction demand to ensure safety and driver comfort based on the geometry (grade, radius of curvature and superelevation) and anticipated speed of vehicles navigating the curve....
Safety Article May 01, 2015
To help states evaluate their work-zone practices, and to help assess work-zone practices nationally, the Federal Highway Administration (FHWA) developed the Work Zone Mobility and Safety Self Assessment (WZ SA) tool.   The WZ SA tool consists of a set of 46 questions designed to assist those with...
Safety Article May 01, 2015
Who would have imagined five years ago that cell phones and texting would become so deadly?   As an avid motorcyclist, I can attest that literally every “close encounter” I have with a four-wheeler features a distracted driver either talking on a cell phone or texting. As bad as it is on the open...
Winter Maintenance Article May 01, 2015
The Minnesota Pollution Control Agency (MPCA) is charged with protecting the waters of our state.   We have 11,842 lakes and 92,000 miles of river. We not only love our water but we use our water. One out of six of us owns a boat, 900,000 are registered each year and with our 158 species of fish,...
Winter Maintenance Article May 01, 2015
As director of snow and ice operations for the Massachusetts Department of Transportation, Paul Brown often recommended investments and process improvements to upper management.   “Lots of times, they’d come back with, ‘What’s the cost-benefit?’” Brown said. “There was nothing out there to help...
Maintenance Article May 01, 2015
Departments of transportation often provide mixture recommendations for various roadside plantings.   In Minnesota, specifications are given by the Minnesota Department of Transportation (Mn/DOT) for a number of different turf plantings, including salt-tolerant turf for roadsides. Even though these...
Maintenance Article May 01, 2015
$2,696 per lane-mile.   That is how much the Wisconsin Department of Transportation spent on snow removal, deicing and other winter-maintenance activities in the 2010-11 winter season. This cost reflects how formidable a task winter maintenance is in states with snowy climates; in Wisconsin alone...
Maintenance Article May 01, 2015
It has not been raining sideways in Charlotte, N.C., but Ken Hooker knows better than to get slapped in the face with the unexpected.   This is why the deputy streets superintendent for the city of Charlotte is gearing up for a 2013-14 winter season that could drop more precipitation than normal....
Safety Article May 01, 2015
Two-way left-turn lanes (TWLTLs) and raised medians are the two most common types of median treatments.   A TWLTL is a continuous lane between opposing lanes of traffic to allow traffic to make left turns from both directions, and a raised median is a physical barrier that separates opposing lanes...
Safety Article May 01, 2015
At the heart of intelligent transportation systems (ITS) is the notion of getting information about the transportation network to those who need it in a timely, efficient manner.   Better-informed drivers make smarter, safer traveling decisions. Traffic-management personnel—if armed with better...
Safety Article May 01, 2015
When a lane is closed on a two-lane, two-way roadway, flaggers are typically used to control the flow of traffic through the work zone.   While various measures have been implemented in recent years to improve the safety and effectiveness of flaggers, crashes involving flaggers still occur and...

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