High-resolution digital elevation models (HR-DEMs) originating from airborne laser scanning (ALS) point clouds must be transformed into Culvert-modified DEMs for hydrological and geomorphological analysis. To produce a culvert-modified DEM, information on the locations of drainage structures (DSs) (e.g., bridges culverts) is essential. Nevertheless, DS mapping techniques, whether in connection ...

Background A finite element (FE) model based on a 2012 Toyota Camry passenger sedan was developed through the process of reverse engineering by the Center for Collison Safety and Analysis (CCSA) researchers under a contract with the Federal Highway Administration (FHWA). The model can be downloaded from the library of FE vehicle models developed to support crash simulation efforts [1]. The mode...

Foreward This report documents the findings of a phenomenology study that analyzes the performance of HERMES ground-penetrating radar technology. HERMES technology was designed for the evaluation of concrete bridge deck deterioration, with a particular emphasis on the detection of corrosion-induced delaminations. HERMES technology was developed by Lawrence Livermore National Laboratory through ...

In this paper the results of an experimental program were presented to show effect cross bracing on behavior composite bridges. Two types models prepared in laboratories American University Cairo Egypt. These chosen be one tenth scale model Federal Highway Administration (FHWA). Deflections and strains measured for each according set comparisons made bracing.

FHWA has completed a multiyear study of systems and techniques to identify and characterize cracks in steel bridge structures. The study was conducted by FHWA’s Nondestructive Evaluation (NDE) Laboratory at the Turner-Fairbank Highway Research Center in McLean, VA. The study, called the Steel Bridge Testing Program, was authorized under the 2005 Safe, Accountable, Flexible, Efficient Transporta...

In spite of these facts, Americans still feel surprisingly safe on the roads. According to the U.S. Department of Transportation’s Federal Highway Administration, only 5% of people feel that the roads are unsafe (FHWA 2005). Drivers report that they are satisfied with road conditions, as well as enforcement of key safety laws, such as those that pertain to speeding, drinking and driving, and sa...

Introduction Congestion bottlenecks are severe traffic chokepoints where demand far exceeds available highway capacity. The Federal Highway Administration (FHWA) of the US Department of Transportation states that recurring bottlenecks account for the largest share of road delay in the United States (40%), far exceeding traffic incidents (25%), inclement weather (15%), construction (10%) or othe...

large urban areas are facing growing problems of noise pollutions. geospatial information systems (gis) can conveniently be adapted to gather, analyze and present noise information. gis can also be extended to answer to user specific problems through deterministic and statistics models. the objectives of this research were to measure urban traffic noise levels, analyze temporal and spatial dyna...