Metropolitan Government Pavement Engineers Council - MGPEC

News

ITEM 9 

The Steering Committee for the Metropolitan Government Pavement Engineers Council is pleased to announce that Item 9, – Hot Mix Asphalt (HMA) and Stone Matrix Asphalt (SMA), of the MGPEC Pavement Design Standards and Construction Specifications manual, has been updated.  Over the past 11 months, an Asphalt Specification Task Force consisting of a diverse group of members from governmental agencies and industry representatives has reviewed and amended Item 9 of the MGPEC Specifications, as well as the accompanying Form #9 used to select the actual asphalt mix requirements.

They were accepted by the MGPEC Steering Committee at the monthly meeting on October 2, 2008.  A hard copy of Item 9 and Form #9 was mailed to all registered manual holders to place the latest revision in their copy of the Manual.  If you have more than one registered copy of the manual, additional copies of Item 9 were mailed as well.  Revisions are sent to the registered manual holder.  If that person is no longer with your organization, we would appreciate your help in updating our information.  Please contact Pamela Weimer, MGPEC Administrative Assistant, to transfer the registration.  (bdweimer@msn.com or 303-979-2190)

Our thanks go out to all who worked on this document, which is based on current technologies and industry standards. We have worked throughout 2007 and 2008 with CAPA members and MGPEC members in reaching this consensus for the Specification Item #9 and Form #9. These are the major changes to the Specification and Form #9:

  • Added or updated aggregate properties
  • Incorporated the best of CDOT's new RAP spec and SMA spec, and integrated these throughout the various specification sections.
  • Included the RAP quality control plan as a result of increasing the maximum RAP level to 25%
  • Added N=50 for low volume, low load traffic levels mixes
  • Updated various requirements for equipment and manufacturing the mix
  • Modified various mixture and placement temperature limits
  • Added a joint density requirement
  • Updated conformity requirements, mostly concerning thickness and use of the cost reduction section
  • Included the CDOT Pre-Paving Conference Agenda for agencies that need one.

We encourage any Agency to keep these specifications intact without changes. Should the Agency see the need to make a modification to these specifications for their own use, they should do so by using a separate document that would state: “Revisions to the October 2008 version of MGPEC Item #9 Specifications".  This would allow any contractor who is already familiar with the MGPEC standard specification to easily and clearly know what revisions have been made for a particular project.

The Steering Committee in the future will be reaching out to the membership for their help in the research and the exchange of information on other topics within the Pavement Design Standards and Construction Specifications.  We all benefit from our interaction with each other and share in the wisdom and knowledge of the membership and, in turn, so will the citizens within the Denver metropolitan region.  It is the Steering Committee’s vision and desire to be a valuable asset to the government pavement engineers in the Denver metropolitan area. .

MGPEC is in the process of upgrading additional Items within the Pavement Design Standards & Construction Specifications and are evaluating other aspects that affect transportation and roadway construction specifications.  The MGPEC steering committee urges you to participate in one or more task forces working on these issues.  Please feel free to contact any one of the steering committee members for more information.

Thank you for your support in MGPEC.

Pat Kennedy, PE

City & County of Denver

MGPEC Steering Committee Chairman

Next MGPEC Meeting 
The next MGPEC meeting will be held Thursday, January 15, 2009 at 1:30 p.m.  The meeting will be held at the City & County of Denver office located at 5440 Roslyn Street, Denver, Colorado.   



January 2009 Agenda

Highway Worker Safety Regulations 

There are new Highway Worker Safety Regulations concerning worker visibility in workzones that are coming on-line in November. 

Please visit these websites for more information: 

FHWA's Office of Safety:  http://safety.fhwa.dot.gov/wz/index.htm

The Work Zone Safety Clearinghouse at Texas A&M Universityhttp://wzsafety.tamu.edu/

The American Traffic Safety Services Association:  http://www.atssa.com/ 

Be sure to visit this page for details on the new safety vest requirements:  http://www.occunomix.com/anshv.html

American National Standard For High-Visibility Safety Apparel- ANSI/ISEA 107-1999

American National Standard For High-Visibility Safety Apparel-
ANSI (American National Standards Institute)/ISEA (International Safety Equipment Association) 107-1999

Road construction, railway and utility workers; law enforcement and emergency response personnel; survey and airport ground crews and others are routinely exposed to the hazards of low visibility on the job. Now they can be assured of being seen, both day and night, if they wear apparel that conforms to a newly-published American National Standard from ISEA, The International Safety Equipment Association.

Until the publication of this document, there was no uniform, authoritative guide for the design, performance specifications, and use of high visibility and reflective apparel including vests, jackets, bib/jumpsuit coveralls, trousers and harnesses. Garments that meet this standard can be worn 24 hours a day to provide users with a high level of conspicuity through the use of combined fluorescent and retroreflective materials.

The standard specifies three conspicuity classes of garments based on wearer's activities:

Class 3 garments provide the highest level of conspicuity where traffic exceeds 50 mph and are intended for workers who face serious hazards where weather, work or other factors impair visibility or often have high task loads that require attention away from their work. The standard recommends these garments for all roadway construction personnel, flaggers, and vehicle operators, utility workers, survey crews, emergency responders, railway workers, accident site investigators, and emergency response.

Class 2 garments are intended for users during activities that need greater visibility in inclement weather conditions, or who perform tasks that divert their attention from appoaching traffic, whose work environments that have risks that exceed those for Class 1 and whose activities occur near roadways where traffic speeds exceed 25 mph but less than 50 mph. Workers who would wear this class of garment include railway workers, school crossing guards, high volume parking and toll gate personnel, delivery vehicle drivers, airport baggage handlers, ground crew, trash collection and recycling operations, ship cargo loading operations, forestry operations, roadway construction, utility, and emergency response and law enforcement personnel.

Class 1 garments may be suitable for workers not directly in vehicle traffic paths and where vehicle speeds do not exceed 25 mph. Class 1 is suitable when workers' activities permit their full attention to approaching traffic. Parking service attendants, workers in warehouses with equipment traffic, shopping cart retrievers, sidewalk maintenance workers, and delivery vehicle drivers may wear this class of garment if above criteria are met.

This page has good examples of vests that need to be replaced:  http://www.atssa.com/galleries/rsti/Brochure%20on%20Decommissioning%20High%20Visibility%20Apparel%20-%20FINAL%20for%20Printing%200308.pdf  (This is a 2 Mb .pdf file... so I didn't attach it to this e-mail.)

There are also new standards on Traffic Sign Retro-Reflectivity that you need to be aware of.  Please visit this page for more details:  http://safety.fhwa.dot.gov/roadway_dept/retro/index.htm

Please check back soon for the most current MGPEC news.

MGPEC* 6540 S. Tabor Street* Littleton, Colorado * USA * 80127* Phone: (303) 979-2190 * Fax: (303) 979-2190