TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2129 includes 17 papers that explore vehicle reidentification algorithms, privacy preservation in intelligent transportation systems and the vehicle–infrastructure integration initiative, advanced traveler information systems deployment, dynamic message sign deployment and traveler diversion behavior, real-time detection of hazardous traffic events on freeways, and an automatic traffic conflict detection system. This issue of the TRR also examines the processing traffic data collected by remote sensing, advanced traffic information systems, travel time estimates from inductive loop and toll collection data, real-time estimation of urban street travel time using probe buses, guidelines for inspection and maintenance of intelligent transportation systems, emerging technologies for congestion reduction, video detection at signalized intersections, field performance of a regional WiMAX network, real-time traffic information and navigation, driver behavior and acceptance of infrastructure-to-vehicle communication systems, and traffic flow impacts of adaptive cruise control with on- and off-switching.

TRB’s Transit Cooperative Research Program (TCRP) Research Results Digest 94: Synthesis of Information Related to Transit Problems is a digest of the progress and status of TCRP Project J-7, “Synthesis of Information Related to Transit Problems,” for which the Transportation Research Board is the agency conducting the research.

A slideshow summary of the Transportation Research Board's pre- and post-September 11, 2001, transportation security activities is updated monthly.

TRB's Cooperative Research Program produces a table summarizing more than 80 security and emergency preparedness projects representing over $11 million in the contract research programs for state departments of transportation and the public transportation industry. Updated monthly.

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2126 includes 18 papers that explore bond strength of tack coat materials, the fatigue endurance limit of hot-mix asphalt, warm-mix asphalt production process, forensic analysis of reflective cracking on an interstate highway, a surrogate performance indicator for control of thermal cracking, intrinsic healing properties of asphalt binders, and characterizing fatigue of asphalt binders. This issue of the TRR also examines asphalt binder creep and recovery tests, crumb rubber bituminous mixes, fiber-modified bituminous mixes, field performance testing of reclaimed asphalt pavement mixes, performance of polymer modified asphalt mix with reclaimed asphalt pavement, moisture damage in warm-mix asphalt containing moist aggregate, foamed warm-mix asphalt projects, comparison of asphalt rubber and conventional mixture properties, a higher specification for reclaimed asphalt pavement, and warm-mix asphalt additives effects on workability and mechanical properties of reclaimed asphalt pavement.

TRB’s National Cooperative Highway Research Program (NCHRP) Research Results Digest 343: Continuing Project to Synthesize Information on Highway Problems is a digest of the progress and status of NCHRP Project 20-5, “Synthesis of Information Related to Highway Problems.”

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2127 includes 20 papers that explore variability in the modified Lottman test, the American Association of State Highway and Transportation Officials (AASHTO) T283; noise and friction of dense-graded asphalt, stone matrix asphalt, and porous friction course; bonding of hot-mix asphalt (HMA) and concrete surfaces; dynamic modulus test to evaluate moisture susceptibility of asphalt mixtures; fatigue models of HMA; the energy ratio concept as a predictor of top-down cracking; determining representative volume elements of asphalt concrete mixtures without damage; and low design temperatures of asphalt pavements in dry-freeze regions. This issue of the TRR also examines application of the generalized J-integral to crack propagation modeling of asphalt concrete, finite element analysis of HMA cracking, use of small samples to predict fatigue lives of field cores, micromechanical modeling of HMA, low-temperature field performance and laboratory testing of 10 test sections, precision of AASHTO TP62-07, refinement of flow number as determined by asphalt mixture performance tester, long-lasting asphalt mixtures, fracture resistance of Illinois HMA overlay mixtures, effective temperature for analysis of permanent deformation and fatigue of asphalt mixtures, the E* test using HMA specimens with varying void contents, and artificial neural networks for estimating the dynamic modulus of asphalt concrete.

TRB’s Airport Cooperative Research Program (ACRP) Research Results Digest 8: Synthesis of Information Related to Airport Practices is a digest of the progress and status of ACRP Project 11-03, Synthesis of Information Related to Airport Practices.

TRB’s second Strategic Highway Research Program (SHRP 2) has released a project brief that summarizes SHRP 2 Renewal project R16, which explored strategies, arrangements, techniques, and processes designed to help facilitate beneficial relationships between railroads and public agencies. The final report of the project includes eight model agreements that can be modified to meet the legal requirements and accepted contracting processes of individual agencies and railroads.

TRB’s second Strategic Highway Research Program (SHRP 2) has released the latest version of its Renewal Program Brief, which summarizes recent progress within the Renewal area of SHRP 2.