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Transportation Maintenance Innovation

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Katie Johnson

No Boundaries May 2022 Peer Exchange Highlights

May 13, 2022

No Boundaries held its first peer exchange of 2022 from May 3-5 with an in-person meeting in Sacramento. Highlights of the event include roundtable discussions on hot-topic issues: guardrail repair and replacement procedures, the effects of the new federal rules related to commercial driver’s licenses, and states’ approaches to managing materials supply shortages.

Featured presentations showcased other leading efforts and creative solutions, such as Front Range College’s new program designed to create pathways for high schoolers into maintenance careers and Caltrans’ efforts to lower carbon emissions with Zero Emission Vehicles.

During the Innovation Show-and-Tell, consistently one of the most popular sessions, No Boundaries members shared the new tools and practices they’ve developed and adopted to make maintenance work easier and safer in the field. In addition, two technical site visits — to Caltrans’ HQ equipment shop and maintenance training academy backlot – provided behind-the-scenes insights and hands-on demonstrations to round out the event.

Additional information and the full agenda are available on the meeting page. Stay tuned for details about No Boundaries’ future peer exchange events in the fall of 2022 and spring of 2023!

Image source: No Boundaries

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No Boundaries’ May Peer Exchange Is Next Week – All No Boundaries Members Are Welcome

April 28, 2022

No Boundaries members are convening next week for the first peer exchange in 2022 in beautiful Sacramento, California.

With a packed schedule of presentations, discussions and on-site demonstrations, this three-day event hosted by the California Department of Transportation (Caltrans) has been designed to offer informative programming for transportation maintenance professionals and their agency colleagues attending virtually or in person.

All staff from No Boundaries member states are invited to participate remotely in any part of the event. Contact Brian Hirt if you would like a Zoom meeting invitation.

Highlights from the full agenda follow.

Tuesday, May 3 – Our first day will feature guest speakers’ discussions on a range of topics including maintenance education geared for high schoolers, impacts of the federal government’s new rules regarding commercial driver’s licenses, and innovative maintenance solutions. Caltrans’ guest presenters will also give updates on the agency’s research program, zero emissions vehicles program, and drone program.

Wednesday, May 4 – Attendees in Sacramento will take part in a technical site visit and practitioner Q-and-A at Caltrans’ main equipment shop in the morning, followed by a No Boundaries business and planning meeting in the afternoon.

Thursday, May 5 – On the final day of the event, in-person attendees will head to the backlot of Caltrans’ maintenance training academy for behind-the-scenes views and hands-on demonstrations. Later, all attendees are invited to participate in a roundtable discussion on materials supply shortages. Presentations will be given by representatives from the American Public Works Association and the Federal Highway Administration to round out day three.

Image source: Caltrans

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Michigan Develops Guidance for Planting on Roadside Slopes

April 20, 2022

The green spaces along sloped urban highway roadsides can present a variety of challenges for maintenance crews. Mowing these steep areas can be hazardous, but pollution and other factors can make it difficult to grow anything other than turfgrass.

To find low-maintenance alternatives, the Michigan Department of Transportation (MDOT) commissioned a research study to test and track a variety of soil improvement strategies and plant types over several years. The efforts resulted in a documented process for improving roadside soils as well as a list of plants that can be reliably grown—and which require minimal maintenance—along sloped areas in similar climates.

View the video and read the two-page brief to learn more about the project’s findings.

Image source: Michigan Department of Transportation

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Upcoming Webinar on Forensic Evaluation and Pavement Performance

April 15, 2022

The Washington State Department of Transportation will host the virtual webinar, “Forensic Evaluations: Listen to What Our Pavements are Telling Us” on Wednesday, April 20 from 12:30 – 1:30 p.m. Central.

Through the federal Long-Term Pavement Performance (LTTP) program, data collected on pavement sections removed from service have helped explain how and why the pavements performed as they did. This webinar will discuss the history of the LTTP program, its evolution to become a current pooled fund study and what insights the data have provided.

Learn more and register.

Image source: Washington State DOT

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Florida Develops Guidance for Pavement Blisters

April 5, 2022

Blisters, or bulges of an asphalt pavement’s surface, sometimes occur when moisture becomes trapped between layers of asphalt. However, a variety of environmental, material and other factors contribute to whether blisters appear and how severely they form, making them a challenge to predict and study.

To better understand why blisters occur and how they affect the pavement’s service life and ongoing maintenance needs, the Florida Department of Transportation compared five segments of the same road project with and without blisters. The research resulted in recommended paving strategies to keep these distresses from forming, as well as guidance for repairing blistered pavements.

Read the research summary: Evaluation of Roadway Worms/Distortions, February 2022.

Image source: Florida Department of Transportation

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Indiana Develops Tests for Asphalt Marking Materials and Adhesives

March 29, 2022

To identify which pavement marking materials work best on asphalt surfaces in the Midwest, the Joint Transportation Research Program—a collaboration between Indiana DOT and Purdue University—developed and assessed a variety of new testing methods and protocols.

Designed to assess a range of properties, such as elasticity, durability and bond to the pavement, the tests can help maintenance crews identify tapes and thermoplastics that are likely to adhere well to pavements and withstand extreme temperature fluctuations.

Read the report: Mechanical Properties of Durable Pavement Marking Materials and Adhesion on Asphalt Surfaces, October 2021

Image source: Joint Transportation Research Program

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