Compared with much of the world, the United States has relatively few highway tunnels. Norway, for instance, has more than 900 roadway tunnels, while the entire United States has 503. In a feature article in TR News magazine, Number 327, May-June 2020, the authors examine the challenges of using tunnels in a road or rail network, including relatively high first costs, the need for continuing ma...

TRB’s Transportation Research Record (TRR), No. 2670 consists of 11 papers that explore finance and pricing, including: Measuring Drivers’ Attitudes Toward Use of Electronic Toll Collection Systems in Spain Probabilistic Approach to Evaluate Acceptable Toll Rates in Road Concessions Assessing the California Fuel Tax Swap of 2010 Who Should Pay for Local Streets? Who Does? Survey of New Jersey M...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2635 consists of 11 papers that explore visibility and work zone traffic control, including: Developing a Web-Based Tool to Track Highway Safety Planning Progress in California Probability of Secondary Crash Occurrence on Freeways with the Use of Private-Sector Speed Data Roadway Safety Policy and Leadership...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2603 consists of 10 papers that explore aviation, including: Enhancing Safety Risk Management with Quantitative Measures Data-Driven Planning for Ground Delay Programs Representative Weather Profiles in Airport Planning Forecasting Airport Building Electricity Demand on the Basis of Flight Schedule Informati...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2536 explores 12 papers related to paratransit and emerging technologies in the public transportation sector, including: Implementing Mobility as a Service: Challenges in Integrating User, Commercial, and Societal Perspectives Carsharing Demand Estimation: Zurich, Switzerland, Area Case Study Integrated Relo...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2508, explores 13 papers related to concrete materials, including: Development of Innovative Antifreeze Grout Mortar for Anchor Applications in Cold Regions Interlaboratory Study and Precision Statement for AASHTO T 336 Test Method Flexural Behavior of High-Volume Fly Ash Concrete Beams: Experimental Study A...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2498 consists of 13 papers covering the following topics relating to network modeling: Markov Chain Modeling of Pavement Surfacing Heuristic Approach to Capacitated Traffic Assignment Problem for Large-Scale Transport Networks Parking Reservation for Managing Downtown Curbside Parking Investigation of Centro...

TRB’s Transportation Research Record (TRR): Journal of the Transportation Research Board, No. 2446 consists of 10 articles that explore a method for evaluating moisture susceptibility and rutting using the Hamburg wheel tracking test; the influence of air void content on moisture damage susceptibility of asphalt mixtures; a performance-based moisture susceptibility evaluation of warm-mix asphal...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2364 consists of 10 papers that explore variable speed limit control strategies; opinions on safety policy; rural roadway departure crashes; traffic calming measures in New York City; safety management tools; high-crash-risk intersections; fatal crash reductions; road safety communication campaigns; evaluati...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2342 consists of 15 papers exploring concrete materials, including: • Effect of High-Volume Fly Ash on Shear Strength of Concrete Beams • Identifying Improved Standardized Tests for Measuring Cement Particle Size and Surface Area • Performance of Pore-Lining Impregnants in Concrete Protection by Unidirection...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2323 consists of 12 papers that examine peoples' sense of place through the use of the mixed-method approach; modeling traveler response to park-and-ride; automobility; travel patterns of the elderly; structural equations model of land use patterns, location choice, and travel behavior; parental attitudes to...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2322 contains 14 papers that address aspects of travel behavior including composition of vehicle occupancy for work trips; hybrid choice sets in semicompensatory models; integrating walkability with planning practices; the influence of environmentalism and variety on mode choice; behavioral insights models; ...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2316 consists of 15 papers that explore gap acceptance behavior; driving behavior in emergency situations; driver anticipation; phase transition models; integrated lane change models; models for pedestrian-vehicle interactions at road crossings; midblock pedestrian crossings; exit choice decisions during ped...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2314 consists of 16 papers that explore transportation policy related to electric bikes; flashing beacons at trail crossings; the lateral placement of motor vehicles when passing bicyclists; separated, on-street bicycle infrastructure; and greenway quality. This issue of the TRR also examines bicycle level o...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2311 explores 18 papers concerned with traffic signal systems including performance measures for adaptive signal control; calibration of platoon dispersion model; impacts of transit priority on signal coordination; prediction of red light running using inductive-loop detectors; modeling of auxiliary through ...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2300 consists of 18 papers that explore airport surface safety; infection-spreading links in an air traffic network; intercity passenger rail access to airports; reducing aviation’s carbon dioxide emissions; valuing aviation noise with the contingent valuation method; characterization of surface and aloft wi...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2296 consists of 15 papers that explore dynamic modulus master curves; the self-healing capability of asphalt mixtures; permanent deformation of asphalt concrete in compression; asphalt concrete fatigue analysis; hot-mix asphalt permanent deformation; calibration and validation of overlay tester-based fatigu...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2295 consist of 8 papers that explore the measurement of hydraulic conductivity in porous mixes, surface friction performance of chip seals, asphalt pavement surface texture, moisture susceptibility testing of warm-mix asphalt mixes, material characteristics of asphalt mixtures relationship to highway noise,...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2294 consists of 12 papers that explore reclaimed asphalt pavement mixtures; the effects of aggregate gradation on performance of Superpave mixtures; warm-mix asphalt mixtures and additives; and filler fractional voids.

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2291 consists of 14 papers that examine managing a major transportation program with data from geographic information systems (GIS); using GIS for mapping oversized and overweight truck routes; work zone safety analysis; traffic monitoring systems; and monitoring travel time reliability. This issue of the TR...