In bridge engineering, machine learning (ML) and artificial intelligence (AI) have been employed to enhance the efficiency of the structural design phase, aid in the selection of optimal bridge types, produce cost estimates, conduct realtime structural…
Category: TRB
On-Demand Aviation Services for Mobility, Logistics, Emergency Response, and Humanitarian Use Cases
Aviation is undergoing a transformation. Advancements in technology are enabling innovations in regional and on-demand aviation. Many challenges are currently being addressed, including community acceptance, safety, equity, issues around planning and i…
Taxonomy and Terms for Stakeholders of Older Adult Mobility
The community of stakeholders in safe mobility for older adults use technical terms or expressions that can have very specific meanings across disciplines. The variety of different interpretations often leads to miscommunication. Moreover, the terminol…
Programmatic Implementation of Alternative Contracting Methods
Alternative contracting methods (ACMs), including design-build, construction manager/general contractor, and public-private partnerships have added a wide range of options for state departments of transportation (DOTs) to consider when delivering proje…
Practices for Statewide and MPO Coordination
State departments of transportation (DOTs) are required by federal law to coordinate transportation planning and programming processes with metropolitan planning organizations (MPOs) in the state. However, state DOTs and MPOs have varying coordination …
Tactile Wayfinding in Transportation Settings for Travelers Who Are Blind or Visually Impaired
Travelers who are blind or visually impaired use a variety of cues and strategies to orient themselves within their surroundings and move through space to where they want to go. This wayfinding process can be particularly challenging in complex urban e…
Subgrade Soil Susceptibility to Shrink/Swell and Frost Heave: Effects on Pavement Performance
Expansive clay soils that are susceptible to shrink and swell and silty soils that are susceptible to frost heave are found in many parts of the United States. At these locations, these soils serve as the subgrade of the pavement structure. NCHRP Resea…
TR News 348: Intercity Buses: Planning for a Post-Pandemic Paradigm
The intercity bus industry experienced unprecedented growth before the COVID-19 pandemic and seemed poised for further expansion. The industry embraced technology to provide dynamic scheduling and pricing, booking and boarding were simplified through c…
MASH TL-3 Deflection Reduction for 31-Inch Guardrail: A Guide
Roadside obstacles are often too close to the roadway to permit the installation of common guardrail designs. Guardrail systems are often modified with a combination of tighter post spacing, nesting of rails, and other guardrail stiffening mechanisms t…
Combined High-Visibility Enforcement: Determining the Effectiveness
The National Highway Traffic Safety Administration defines high-visibility enforcement (HVE) as a universal traffic safety approach designed to create deterrence and change unlawful traffic behaviors. HVE combines highly visible and proactive law enfor…