TRB Webinar: Not Your Average Analysis – Introducing Travel Time Reliability in the HCM

August 22, 2019 01:00 PM - 02:30 PM U.S. Eastern
Cost (for your seat)
Professional Development Hours for this webinar
1.50 hour(s)
Continuing Education Hours for this webinar
AAE: 0.00 hour(s)
AICP: 0.00 hour(s)
CLE: 0.00 hour(s)

Traffic operations and management practitioners are invited to a TRB webinar on Thursday, August 22, 2019, from 1:00-2:30 PM. This webinar will discuss travel time reliability estimation methods in the Highway Capacity Manual (HCM), Sixth Edition: A Guide for Multimodal Mobility Analysis. The HCM is commonly used by transportation agencies to evaluate and forecast operations of roadway facilities.  The current version was released in late 2016.

Travel time reliability aims to quantify the variation of travel time and is defined using the entire range of travel times for a given trip, for a selected time period (for example, the peak period on weekday afternoons), and over a selected horizon (for example, a year). Measuring travel time reliability requires that a sufficient history of travel times be present to track travel time performance. The HCM enables analysts to estimate reliability when insufficient historical data is available or to predict the impacts of highway improvements and advanced operations strategies on reliability. Presenters will describe how to apply travel time reliability methods to the analysis of freeways, and urban streets.

This webinar was organized by the TRB Standing Committee on Highway Capacity and Quality of Service. It is the third in a series of webinars about the HCM. The first two were conducted on June 10, 2019 and July 29, 2019.

Some registrants will need to pay $95 to attend this webinar.  Sign into to view registration information.

Webinar Presenters

  • Rick Dowling, Kittelson & Associates
  • Tyrone Scorsone, Kittelson & Associates

Moderated by: Bastian Schroeder, Kittelson & Associates

Webinar Outline

  1. Overview of travel time reliability methods
  2. Overview of research results and guidance document
  3. Applying travel time reliability methods
  4. Question and answer session

The first 60 minutes of the webinar will be for presentations and the final 30 minutes will be reserved for audience questions.

Learning Objective

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

  1. Apply travel time reliability methods

Professional Development Hour Information

A certificate for 1.5 Professional Development Hours (PDHs) will be provided to Professional Engineers (PEs) who register and attend the webinar as an individual. For approved webinars, TRB’s webinar program awards Registered Continuing Education Provider (RCEP) Professional Development Hour (PDH) credits associated with participation only to the registered individual and not to other members of a group that view the webinar together. To receive PDH credits, please register as an individual and sign into the webinar from your personal computer. After doing this, you may join your group in a meeting room.  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.

In addition, advance registration is available until just before the webinar starts. Once the webinar starts, you will be unable to submit your registration. 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.

Individuals registered as Florida PEs are no longer required to email TRB with your license number to report your attendance. Instead, please use your certificate that TRB provides through as verification of your attendance to the Florida Board of Professional Engineers.

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

This webinar was developed in March 2019. TRB has met the standards and requirements of the Registered Continuing Education Program (RCEP). Credit earned on completion of this program will be reported to RCEP by TRB. Complaints about registered providers may be sent to RCEP, 1015 15th Street, NW, 8th Floor, Washington, DC 20005. Website:

Registration questions? Contact Reggie Gillum at