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Programmatic Implementation of Alternative Contracting Methods
4/17/2024 6:00:30 PM
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 projects. NCHRP Synthesis 625: Programmatic Implementation of Alternative Contracting Methods , from TRB's National Cooperative Highway Research Program, documents state DOT practices of programmatic approaches to ACMs.
Practices for Statewide and MPO Coordination
4/17/2024 6:00:29 PM
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 practices depending on their specific contexts. NCHRP Synthesis 626: Practices for Statewide and MPO Coordination , from TRB's National Cooperative Highway Research Program, documents current DOT strategies and practices to facilitate coordination between s...
Tactile Wayfinding in Transportation Settings for Travelers Who Are Blind or Visually Impaired
4/12/2024 6:00:00 PM
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 environments where some cues, such as detectable edge treatments, the sound of surging parallel traffic, or other indicators may be inconsistent, confusing, misleading, or missing. TCRP Research Report 248: Tactile Wayfinding in Transportation Settings for T...
Subgrade Soil Susceptibility to Shrink/Swell and Frost Heave: Effects on Pavement Performance
4/12/2024 5:15:00 PM
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 Research Report 1096: Subgrade Soil Susceptibility to Shrink/Swell and Frost Heave: Effects on Pavement Performance , from TRB's National Cooperative Highway Research Program, presents a state-of-the-art update to pavement design procedures to better reflect the...
TR News 348: Intercity Buses: Planning for a Post-Pandemic Paradigm
4/11/2024 1:00:00 PM
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 customer-friendly applications and electronic ticketing, and customers were enticed by free Wi-Fi and onboard entertainment. " Intercity Buses: Planning for a Post-Pandemic Paradigm," by Matthew W. Daus, details that while a full recovery has not yet o...
MASH TL-3 Deflection Reduction for 31-Inch Guardrail: A Guide
4/9/2024 2:12:23 PM
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 to reduce deflections. NCHRP Research Report 1100: MASH TL-3 Deflection Reduction for 31-Inch Guardrail: A Guide , from TRB's National Cooperative Highway Research Program, presents a guide on the use of stiffening mechanisms to reduce the deflection for 31-...
Combined High-Visibility Enforcement: Determining the Effectiveness
4/4/2024 7:00:51 PM
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 enforcement targeting a specific traffic safety issue. Law enforcement efforts are combined with visibility elements and a publicity strategy to educate the public and promote voluntary compliance with the law. BTSCRP Research Report 10: Combined High-Visibility...
Wintertime Pavement Maintenance Practices
4/4/2024 7:00:30 PM
State transportation agencies have many tools available with which to maintain pavements proactively. These include tools such as pavement management systems to track roadway conditions and life cycle cost analysis tools. NCHRP Synthesis 623: Wintertime Pavement Maintenance Practices , from TRB's National Cooperative Highway Research Program, documents the current state DOT practices for the reactive pavement maintenance performed during the winter months when flexible and rigid pavements must be repaire...
Transformational Technologies and Mobility Inclusion Playbook
4/4/2024 7:00:14 PM
Changes in technology provide opportunities and risks to mobility, particularly as they relate to traditionally and newly underserved populations. In recent years, economic, environmental, and social forces have quickly given rise to shared and on-demand mobility—a collective of entrepreneurs and consumers leveraging technology to maximize transportation and financial resources and generate capital. For instance, shared mobility services have become part of a trend that has pushed shared, on-demand mobil...
Transformational Technologies and Mobility Inclusion Playbook
4/4/2024 7:00:14 PM
Changes in technology provide opportunities and risks to mobility, particularly as they relate to traditionally and newly underserved populations. In recent years, economic, environmental, and social forces have quickly given rise to shared and on-demand mobility—a collective of entrepreneurs and consumers leveraging technology to maximize transportation and financial resources and generate capital. For instance, shared mobility services have become part of a trend that has pushed shared, on-demand mobil...
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