Low-volume roads represent a significant proportion of the transportation infrastructure system, and their maintenance can often be costly. TRB will conduct a webinar on Tuesday, August 4, 2020 from 1:00-2:30 PM Eastern that will explore using Otta seal surfaces for treating low-volume roads. Traditional bituminous surface treatments require high-quality materials and specialized expertise, but Otta seal surfaces can be constructed using more economical local aggregates and regularly available equipment. This webinar will focus on the principles, design, construction, and performance evaluation of Otta seal as an alternative to more traditional bituminous surface treatments.

This webinar was organized by the TRB Standing Committee on Aggregates.

Some registrants will need to pay $55 to attend this webinar. Sign into MyTRB.org to view registration information.

Webinar agenda and presenters

1. Problems with gravel roads: Brian Moore, Iowa County Engineers Association Service Bureau
2. Otta seals: History, principles, and guidelines: Halil Ceylan, Iowa State University
3. Experience, installation and long-term performance: Lee Bjerke, Winneshiek County, Iowa
4. Question and answer session: Moderated by Andrew Dawson, University of Nottingham (ret.)

Learning Objectives

At the end of this webinar, participants will be able to:

1. Define Otta seal
2. Identify current practices for installing a well-performing and long-lasting Otta seal surfacing
3. Determine how Otta seal performs as an alternative to the traditional bituminous surface treatment techniques

Professional Development Hour Information

Professional engineers (PEs) who register and attend the entire webinar as an individual will be awarded 1.5 Professional Development Hours (PDHs). TRB’s webinar program awards PDH credits only to the registered individual, and not to other members of a group that view the webinar together. To be eligible for the credits, individuals must remain signed in for the entire webinar, including for any question and answer session following the presentations.

Pre-registration is required. Once the webinar starts, you will be unable to register. Individuals that are registered for a webinar but do not receive their confirmation emails due to their organization’s internal firewalls should contact the TRB Helpdesk for assistance in signing in.

Please check with your licensing board to ensure that TRB webinar PDHs are approved by your board.

TRB will report credits earned to the Registered Continuing Education Program (RCEP). Complaints about registered providers may be sent to RCEP, 1015 15th Street, NW, 8th Floor, Washington, D.C., 20005.

Registration questions? Contact Reggie Gillum.