The use of precast pretensioned girders using 0.7-in. diameter strands would help bridge designers extend the spans of the existing girder shapes. The TRB National Cooperative Highway Research Program's NCHRP Web-Only Document 315: Details of the Study on the Use of 0.7-in Diameter Strands in Precast Pretensioned Girders is supplemental to NCHRP Research Report 994: Use of 0.7-in. Diameter Strands in Precast Pretensioned Girders .

TRB conducted a webinar on Tuesday, August 14, 2018, from 2:00 PM to 3:30 PM ET that featured research from the Transit Cooperative Research Program (TCRP)’s Legal Research Digest 50 : Public Transit Emergency Preparedness Against Ebola and Other Infectious Diseases: Legal Issues. This webinar examined legal issues that transit agencies may face when an infectious disease epidemic arises. Presenters provided an overview of federal and state laws and available court decisions affecting transit agencies' r...

TRB conducted a webinar on Thursday, August 18, 2016 from 1:00PM to 2:30PM ET that focuses on the rapid changes in the surface transportation maintenance and operations workforce. Factors such as increasing retirement rates, downsizing staff, recruiting and retaining qualified employees, shifting responsibilities, and expanding the use of advanced technologies are influencing these changes. This webinar examined two social factors and two groups of potential workers that have not been fully engaged in ma...

TRB's Airport Cooperative Research Program (ACRP) Synthesis 13: Effective Practices for Preparing Airport Improvement Program Benefit-Cost Analysis explores assessment techniques that can be used by airports in performing benefit-cost analysis for hard-to-quantify benefits from projects needing more than $5 million in Airport Improvement Program discretionary funding.

TRB's Airport Cooperative Research Program (ACRP) Research Results Digest 6: Guidance for Identifying and Mitigating Approach Lighting System Hazards is designed to assist with defining response procedures to mitigate or reduce the hazards associated with aircraft and approach lighting system incidents.  Additional information on the project that developed ACRP RRD 6 was published as ACRP Web-Only Document 4 : Contractor’s Final Report for ACRP RRD 6: Guidance for Identifying and Mitigating Approac...