Mercredi, 28 Août, 2019 - 18:30
This research project was conducted with the objective of evaluating the viability of using an automated computer application to detect, classify, and quantify cracks on flexible and rigid pavement surfaces from digital images, to be implemented in the annual Pavement Condition Survey (PCS). Phase I of this project was focused on identification and...
Mercredi, 28 Août, 2019 - 18:30
Model Systems Engineering Documents for Dynamic Message Sign (DMS) Systems is intended to provide guidance for professionals involved in developing systems engineering documents covering the evaluation, selection and implementation of DMS systems. The full FHWA report is available online at https://ops.fhwa.dot.gov/publications/fhwahop18080/fhwahop18080.pdf...
Vendredi, 12 Juillet, 2019 - 20:00
The European Commission has today published details as to how it intends to put its Strategic Action Plan on Road Safety into practice. This includes a first list of key safety performance indicators (KPI), elaborated in close cooperation with Member States, that will be monitored across the EU to underpin the target of 50% reduction in fatalities and serious...
Vendredi, 12 Juillet, 2019 - 19:45
New shared mobility services have become increasingly common and transportation agencies are beginning to integrate them into regional planning processes. This report provides three case studies of how metropolitan planning organizations (MPOs) and their regional partners are integrating shared mobility into regional multimodal transportation planning. The...
Vendredi, 12 Juillet, 2019 - 19:45
The Smart Work Zone Speed Notification (SWZSN) system aims to alleviate congestion, queuing, and rear end crashes in work zones by informing drivers of the speed of the downstream segment using a type of portable Intelligent Lane Control System (ILCS), Portable Changeable Message Signs (PCMS). The hypothesis was that drivers, knowing the speed up to 1 mile...
Vendredi, 12 Juillet, 2019 - 19:45
Louisiana Transportation Research Center (LTRC) has conducted a research study on LA 493 that provides evidence of damage to roadways caused by inundation. The evidence supporting this comes from three sources: a rod and level cross-section survey taken approximately one month prior to the first inundation event and subsequent cross-section surveys taken after...
Vendredi, 12 Juillet, 2019 - 19:30
The objective of this research project was to develop methodologies for the evaluation of different types of seal-coated, gravel, and dirt roads by using a best-practice-oriented pavement-management system in Illinois. A statewide survey comprised of 13 questions collected 133 responses from county engineers and highway commissioners. Many counties and...
Vendredi, 12 Juillet, 2019 - 19:30
Connected and autonomous vehicle (CAV) technology is evolving at a rapid pace. Transportation agencies must work to develop policies and strategies that will be able to address the organizational, societal, legal and infrastructure impacts of the new technologies. This guide looks at current resources that address these issues, including legislation and federal...
Vendredi, 12 Juillet, 2019 - 19:15
This study compared the fabrication requirements, corrosion resistance, mechanical properties, construction components, and cost of using traditional bridge steels and corrosion-resistant steels. Comparisons were made based on existing literature, discussions with and knowledge gained from industry experts, experimental testing, and field visits. Types of...
Mardi, 18 Juin, 2019 - 19:00
FHWA's HEPH participated in NCHRP's Domestic Scan of design, operation, and policy decisions SDOTs face when considering accommodating additional modes and services within existing rights-of-way. The scan team visited seven geographically-dispersed projects and utilized a variety of multimodal transportation strategies benefitting bicycle, pedestrian,...
Mardi, 18 Juin, 2019 - 19:00
Traffic control devices (TCDs) play a critical role in delivering regulatory, warning, informational, and guidance information to drivers. Transportation agencies devote considerable resources to support TCD installation and maintenance. However, as connected vehicles develop and vehicle automation becomes a reality, the potential exists to replace...
Mardi, 18 Juin, 2019 - 18:45
This toolbox was developed to provide a summary of information that local agencies should be aware of to prepare for connected and autonomous vehicles (CAVs). The main goal of this toolbox is to assist local agencies in preparing for CAVs in the short term - 5 to 10 years. Since local agencies are not generally expected to have the resources to become test beds...
