The AASHTO LRFD Bridge Design Specifications are intended for use in the design, evaluation, and rehabilitation of bridges. The specifications employ the Load and Resistance Factor ..... Read More
These guide specifications provide guidance for developing transportation contract specifications and are the national standard for best practices in highway and road construction. This consensus-based guide ..... Read More
This 2020 3rd edition includes the following revisions and updates from the previous 2015 2nd edition: new fracture mechanics-based model for reflective cracking in AC overlays over flexible, ..... Read More
The AASHTO Materials Standards contain specifications, test methods, and provisional standards commonly used in the construction of highway facilities.
The Materials Standards are updated three times ..... Read More
A Policy on Geometric Design of Highways and Streets, 7th Edition, 2018, commonly referred to as the “Green Book,” contains the current design research and practices for ..... Read More
AASHTO has released a project proposal for the development of AASHTOWare Project Data Analytics. Learn more about this new addition to the AASHTOWare Project Software Series.
Keeping the public moving in all weather conditions is an orchestrated dance between the maintenance forces, the network operators, and the public.The actions of one influences the reactions of the others.Road weather management strategies are employed by both the maintenance forces and the network operators independently or in unison to help mitigate the mobility challenges for the motorists to maintain a safe, reliable transportation system.This is what we call Transportation System Management Operations every day of the year, rain or shine, or TSMO365.
SICOP talks Winter Ops with Steve Cook of the Michigan Department of Transportation, Chairman of the Community of Practice on Road Weather Management and member of the Committee on Transportation System Operations, Committee on Maintenance, and the SICOP Steering Committee.
For more about the Community of Practice on Road Weather Management Strategies click on the LINK
Maintenance is used to responding to severe weather but when the storm escalates into a state of emergency maintenance becomes just one of the players addressing the event.Clear Roads commissioned a project – Emergency Operations Methodology for Extreme Winter Storm Events.SICOP Talks Winter Ops with the Principle Investigator, Jim Sullivan from the University of Vermont – Transportation Research Center and the best practices he uncovered during this project.
For more information about Clear Roads and this project head over to the Clear Roads website at http://clearroads.org
SICOP exists to support member states in fulfilling their winter maintenance mission.As one of AASHTOs Technical Service Programs we are supported through voluntary contributions made by state DOTs.Throughout the year SICOP performs many different activities in this cause.In this episode, SICOP Steering Committee Chair Steve Lund from the Minnesota DOT talks about the accomplishments of the program in 2018. You can see the 2018 Year In Review publication at 2018 year in review.
Send comments directly to the SICOP Coordinator, Rick Nelson at rnelson@aashto.org or start a thread on the Snow & Ice Listserve
You can’t manage what you don’t measure. Agencies have been performing winter maintenance in one manner or another for a hundred years. Measuring how well we’ve been doing is a much harder proposition largely because no two storms are alike and the fact that they come and go so quickly and often overlap. Our two guests on this episode are no strangers to winter maintenance; Steve Lund is the State Maintenance Engineer for the Minnesota DOT and Caleb Dobbins is the State Maintenance Engineer for the State of New Hampshire. Both states have well developed programs to measure how well they perform winter service. Listen in as we talk about levels of service and performance metrics in use today and how they are used to manage winter maintenance operations.
Send comments directly to the SICOP Coordinator, Rick Nelson at rnelson@aashto.org or start a thread on the Snow & Ice Listserve
Why do travelers make the decisions they do during bad weather is a much more difficult question than many transportation agencies are geared up to answer.The trinity of successful winter operations is the maintenance operation, the road weather, and the motorist.Highway agencies have focused much resource on the maintenance operation and road weather but not so much on understanding why motorists do what they do.
The National Academy of Sciences impaneled a project team to explore opportunities to integrate social and behavioral sciences in the weather enterprise during 2016-17.I had the privilege and honor to serve on this panel co-chaired by Dr. William “Bill” Hooke, American Meteorological Society, and Dr. Ann Bostrom, University of Washington.Our final report, Integrating Social and Behavioral Sciences within the Weather Enterprise, has implications for surface transportation.
In this episode Dr. Hooke draws some parallels from his past experiences making the case that if we focus some more energy on the motorist we can have a better winter maintenance operation.
Dr. Hooke has been involved in the atmospheric sciences since 1967 when he began working with the National Oceanic and Atmospheric Administration (NOAA). During his tenure at NOAA he was involved in many programs and research efforts.In 2000 Dr. Hooke became a Senior Policy Fellow at the American Meteorological Society (AMS) and directed the Policy Program from 2001 to 2013.Today he serves as the AMS associate executive director.He authored the book: Living on the Real World: How Thinking and Acting Like Meteorologists Will Help Save The Planet and blogs at Living on the Real World.
The Transportation Research Board is a lot more than the week long Annual Meeting that happens every January. Listen in as SICOP Talks Winter Ops with James Bryant, TRBs Maintenance and Preservation Engineer, as he shares whats on the calendar this next year for the TRB committees on Winter Maintenance and Surface Transportation Weather.
The TRB eNewsletter is another way to keep on top of all the activities and offerings of the TRB throughout the year. Anyone can subscribe through the link HERE
Want to take an active role in the winter committees, AHD65 Winter Maintenance and AH010 Surface Transportation Weather? Head over to My TRB and sign up as friend of the committee to get involved.
Send comments directly to the SICOP Coordinator, Rick Nelson at rnelson@aashto.org or start a thread on the Snow & Ice Listserve
How did the evolution of modern winter maintenance take place? What significant milestones ushered in the tools that make up the modern winter maintenance tool box?
Lee Smithson, formerly of the Iowa Department of Transportation and a past SICOP Coordinator, was one of the few individuals leading the charge that produced significant advancements in winter maintenance technologies. Listen in as SICOP Talks Winter Ops with Lee Smithson, as he shares his recollections on how we got where we are with winter maintenance in the US.
Many agencies have been collecting a lot of data, GPS/AVL coordinates, RWIS, mobile observations, photos and the like.Now comes the time to ask So What?Until you do something with it its just a bunch of 1s and zeros occupying peta bytes of space.There are however great opportunities to mine these data and turn it into information that can help transportation agencies manage the system and their operations.One agency, the Iowa DOT, has take that leap and demonstrated success in turning all that data in useful information.
Tina Greenfield, Iowa DOTs RWIS Coordinator, shares their experiences in working with Big Data.
Agencies have been using salt brines and a variety of other liquid concoctions for years as a winter maintenance strategy. Pre-wetting stockpiles, pre-wetting at the spinner, slurries, direct application for anti-icing have been tried and true practices. Now some have taken the use of liquids to the max, and now, utilizing direct liquid applications through the course of the storm. Some would say using liquid only routes are a risky proposition throughout the storm although some states and countries abroad have been successfully running field trials with liquid only routes.
Jim Hughes, State Maintenance Engineer with the Wisconsin DOT is talking winter ops with SICOP about their experience with liquid only routes.
Having an efficient and effective winter maintenance program is built largely on having the right resources at the right place at the right time. This begs to question, Which way should the snowplow go? Route optimization made the top-10 list of things for a world class winter maintenance program and is front and center on the minds of state members of the SICOP winter maintenance technical service program. Several state DOTs are utilizing route optimization programs and many more are considering starting a route optimization program.
Kyle Lester(CO DOT), Jim Hughes (WI DOT), and Larry Gangle (ND DOT) sit down with SICOP and Talk Winter Ops and talk about their experiences with route optimization in their states.
