scholarly journals ANALYSIS ON TRAFFIC DISTURBANCE OF RAILWAY LOCATED BEHIND PARAPET DAMAGED SEAWALL DUE TO HIGH WAVES

2020 ◽  
Vol 76 (2) ◽  
pp. I_947-I_952
Author(s):  
Tatsuki MURAKAMI ◽  
Katsutoshi KIMURA ◽  
Ryohei KAWAGUCHI ◽  
Masashi OCHI ◽  
Takao NAKOSHI
Keyword(s):  
Traffic Disturbance

Using Traffic Disturbance Metrics to Estimate and Predict Freeway Traffic Breakdown and Safety Events

2021 ◽  
pp. 036119812110124
Author(s):  
Leila Azizi ◽  
Mohammed Hadi
Keyword(s):  
Traffic Safety ◽  
Management Strategies ◽  
Connected Vehicles ◽  
Freeway Traffic ◽  
Transportation Management ◽  
Time To Collision ◽  
Decision Tools ◽  
Traffic State ◽  
Traffic Performance ◽  
Traffic Disturbance

The introduction of connected vehicles, connected and automated vehicles, and advanced infrastructure sensors will allow the collection of microscopic metrics that can be used for better estimation and prediction of traffic performance. This study examines the use of disturbance metrics in combination with the macroscopic metrics usually used for the estimation of traffic safety and mobility. The disturbance metrics used are the number of oscillations and a measure of disturbance durations in the time exposed time to collision. The study investigates using the disturbance metrics in data clustering for better off-line categorization of traffic states. In addition, the study uses machine-learning based classifiers for the recognition and prediction of the traffic state and safety in real-time operations. The study also demonstrates that the disturbance metrics investigated are significantly related to crashes. Thus, this study recommends the use of these metrics as part of decision tools that support the activation of transportation management strategies to reduce the probability of traffic breakdown, ease traffic disturbances, and reduce the probability of crashes.

Optical methods and wireless sensors for monitoring of bridges

2019 ◽  
Author(s):  
Cosmin Popescu ◽  
Björn Täljsten ◽  
Thomas Blanksvärd ◽  
Gabriel Sas ◽  
Alexander Jimenez ◽  
...  
Keyword(s):  
Laser Scanning ◽  
Crack Opening ◽  
Point Clouds ◽  
Base Station ◽  
Optical Methods ◽  
Railway Bridges ◽  
Wireless Monitoring ◽  
Building Information ◽  
Close Range ◽  
Traffic Disturbance

<p>Six railway bridges have been scanned using infrared scanning (IR), close range photogrammetry (CRP) and terrestrial laser scanning (TRS) to reconstruct point clouds and evaluate the potential of the technologies for building information modelling (BIM) and assessment purposes. The results may also help to improve bridge inspection routines. This is done by evaluating the accuracy and quality of the point clouds, time consumption, safety and traffic disturbance.</p><p>Wireless Monitoring has been used in a demonstration project in Sweden. It consists of a base station and nodes. The base station receives signals from the node antennas and transmits the signals to the cloud. The nodes are equipped with strain gauges, crack opening devices, temperature sensors or other suitable sensors for the investigation purpose. Results from the methods and conclusions regarding further use will be presented.</p>

scholarly journals Overview of road performance on the tsunami evacuation road during the n-COVID19 pandemic

2021 ◽  
Vol 331 ◽  
pp. 06006
Author(s):  
Yossyafra ◽  
Anyta Ramadhani ◽  
Vina Gusman ◽  
Monica Herimarni
Keyword(s):  
Large Scale ◽  
New Normal ◽  
Tsunami Disaster ◽  
Traffic Conditions ◽  
Normal Period ◽  
Road Performance ◽  
And Performance ◽  
Traffic Disturbance ◽  
The City ◽  
Better Than

The COVID-19 pandemic has changed the world in various sectors and human activities. Limiting human activity and mobility also has an impact on transportation and traffic. This study aims to calculate the capacity and performance of roads under normal pandemic conditions before PSBB (Large-Scale Social Restrictions) in April 2020 and New Normal in July 2002, as well as predict traffic conditions if the Tsunami disaster hits the city during both periods. Tsunami Evacuation roads in Padang City were selected for analysis. The Indonesian Road Capacity Manual 1997 on urban roads is used as a reference for analyzing road performance indicators. The results showed that; road performance during the PSBB period was better than the New Normal period. The effect of volume and side traffic disturbance factors in the New Normal period makes a significant decrease in performance. Through prediction simulations, if a Tsunami occurs in the two study periods, the analyzed roads can relatively serve evacuation movements. However, the capacity needs to be increased for normal conditions.

scholarly journals The Ageing Effect of Mechanical Joints on the Tyre/Joint Noises Monitored by a Control Vehicle Method without Traffic Disturbance

2013 ◽  
Vol 5 ◽  
pp. 454351 ◽  
Author(s):  
C. K. Wong ◽  
Y. Y. Lee ◽  
J. C. K. Wong ◽  
T. Y. Lo ◽  
A. Y. T. Leung ◽  
...  
Keyword(s):  
Ageing Effect ◽  
Mechanical Joints ◽  
Traffic Disturbance

scholarly journals TRAFFIC DISTURBANCE DUE TO WIND WAVES ON THE LAKESIDE ROAD OF LAKE SHIKOTSU, AND MEASURES AGAINST SUCH DISTURBANCES

2020 ◽  
Vol 76 (2) ◽  
pp. I_953-I_958
Author(s):  
Takao NAKOSHI ◽  
Katsutoshi KIMURA ◽  
Ryosuke SATO ◽  
Yasuji YAMAMOTO ◽  
Masafumi YOSHINO ◽  
...  
Keyword(s):  
Wind Waves ◽  
Traffic Disturbance

Soil Physical and Hydrological Changes Associated with Logging a Wet Pine Flat with Wide-Tired Skidders

1993 ◽  
Vol 17 (1) ◽  
pp. 22-25 ◽  
Author(s):  
W. M. Aust ◽  
T. W. Reisinger ◽  
J. A. Burger ◽  
B. J. Stokes
Keyword(s):  
South Carolina ◽  
Hydraulic Conductivity ◽  
Physical Properties ◽  
Coastal Plain ◽  
Soil Physical Properties ◽  
Soil Porosity ◽  
Hydrological Changes ◽  
Disturbed Areas ◽  
Before And After ◽  
Traffic Disturbance

Abstract A wet pine flat in the coastal plain of South Carolina was harvested with a rubber-tired skidder equipped with 68-in.-wide tires. Soil physical properties were measured immediately before and after a salvage harvest to document changes associated with traffic disturbance. Paired t-tests indicate that the wide-tired operation significantly increased soil volumetric water content, bulk density, and soil strength, and decreased saturated hydraulic conductivity, soil porosity, and depth to the water table. Changes were greatest for the more disturbed areas, and rutting that occurred in the skid trails apparently interrupted subsurface drainage. South. J. Appl. For. 17(1):22-25.

Estimated remaining fatigue life of flexible pavements based on the normalized comprehensive area ratio deflection parameter

2020 ◽  
Vol 47 (5) ◽  
pp. 546-555
Author(s):  
Karthikeyan Loganathan ◽  
Mayzan M. Isied ◽  
Ana Maria Coca ◽  
Mena I. Souliman ◽  
Stefan Romanoschi ◽  
...  
Keyword(s):  
Simulation Analysis ◽  
Area Ratio ◽  
Pavement Management ◽  
Falling Weight Deflectometer ◽  
Structural Capacity ◽  
Pavement Management Systems ◽  
Pavement Structures ◽  
Traffic Disturbance ◽  
Falling Weight

A lot of pavement deflection data are available that may be utilized as a tool to evaluate the structural capacity of pavement structures at network and project levels. Falling weight deflectometer (FWD) is one of the most widely utilized devices in pavement deflection testing. Under FWD testing, deflections generated at several lateral locations as a result of surface loading application are recorded. One of the major downsides of the static FWD testing is the traffic disturbance due to the required lane closures during testing. As an effort to reduce the amount of the required FWD testing on the network level, this study aims to run an advanced computer simulation analysis to mimic the FWD deflection bowl obtained from the field. The entire simulated FWD deflection bowl was utilized in the development of the new comprehensive pavement deflection bowl area parameters. The tensile strain at the bottom of the asphalt layer was successfully related to the developed normalized comprehensive area ratio parameter ([Formula: see text]) and to the number of load repetitions to fatigue failure. The newly developed parameter was evaluated utilizing data for 35 long term pavement performance sections in Texas. The newly developed [Formula: see text] can be easily implemented and utilized as a tool in any pavement management systems.

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