The latest of TRB's National Cooperative Highway Research Program (NCHRP) Ready Results summarizes nondestructive evaluation (NDE) methods for assessing the condition of in-service post-tensioning and stay cable systems. Post-tensioned (PT) girder bridges and stay cable bridges pose a challenge to bridge inspectors because steel tendons used as the primary structural support in these bridges ar...

The California Department of Transportation has released a report that develops a quantile regression method for predicting future traffic flow at a signalized intersection by combining both historical and real-time data. The report includes the result of a case study in Los Angeles County, California.

The Center for Transportation Studies at the University of Minnesota has released a report that expands safety data research on roundabouts by relating the frequency of individual behaviors to specific design features of roundabouts. Previous research into this topic has identified behaviors that are associated with crashes in two-lane roundabouts, with yielding violations and turn violations g...

The Center for Transportation Research at the University of Texas at Austin has released a report that proposes the development of an automated system to efficiently estimate the traffic volumes on uncounted links. Texas does not currently have an automated approach for estimating volumes for links without counts.

The Centre for Automotive Safety Research at the University of Adelaide in Australia has released a report that summarizes the data of vehicle speeds from 2015 and compares the speeds to data dating back to 2002. These data are collected to assess the effects of speed reduction countermeasures and to monitor the speed behavior of South Australian motorists over time.

A featured article in the May-June 2017 issue of the TR News examines how to develop appropriate evaluation frameworks that account for the integration of new technologies into the infrastructure in order to accurately value the current highway system. The TR News is TRB's bimonthly magazine featuring timely articles on innovative and state-of-the-art research and practice in all modes of trans...

TRB's E-Circular 223: Innovations in Freight Data summarize the presentations and discussions that took place at the Innovations in Freight Data Summit on May 17–18, 2017 in Irvine, California. The conference provided a forum to convene traditional freight-planning stakeholders with data and technology experts to discuss recent advances in the innovative application of these big and emerging da...

The Minnesota Department of Transportation has released a report that investigates the potential effects of in-vehicle messages to communicate work zone events to the driver. The research was comprised of literature reviews, a survey, and a driving simulation. The purpose of the study is to understand how to mitigate risks for drivers and crews in work zones.

The May-June 2017 edition of the TR News explores the role of transportation in economic development. Articles feature information about benefit-cost analysis, freight production models, transportation satellite accounts, and right sizing strategies. The TR News is TRB's bimonthly magazine featuring timely articles on innovative and state-of-the-art research and practice in all modes of transpo...

The European Transport Safety Council has released a report that assesses the current state of data collection and reporting on work-related road safety (WRRS) collisions. This report also examines the legal frameworks for WRRS with examples of good practice from various countries. The purpose of the study is to offer policies that may reduce deaths and injuries from WRRS.