An evaluation of 85th operating speed and posted speed limit based on horizontal, vertical alignments and traffic conditions: Case study of two lane urban roadway

2016 ◽  
pp. 377-380
Author(s):  
Azim Bakar ◽  
Mohamad Rani ◽  
Rozlinda Mohamed ◽  
Nur Sani ◽  
Nurjannah Jalal ◽  
...  
Keyword(s):  
Speed Limit ◽  
Operating Speed ◽  
Traffic Conditions

An evaluation of 85th operating speed and posted speed limit based on horizontal, vertical alignments and traffic conditions: Case study of two lane urban roadway

2018 ◽  
pp. 377-380
Author(s):  
Azim Muiz Abu Bakar ◽  
Mohamad Saharol Nizam Abdul Rani ◽  
Rozlinda Mohamed ◽  
Nur Suhadah Sani ◽  
Nurjannah Jalal ◽  
...  
Keyword(s):  
Speed Limit ◽  
Operating Speed ◽  
Traffic Conditions

An evaluation of 85th operating speed and posted speed limit based on horizontal, vertical alignments and traffic conditions: Case study of two lane urban roadway

2016 ◽  
pp. 375-380
Author(s):  
Azim Muiz Abu Bakar ◽  
Mohamad Saharol Nizam Abdul Rani ◽  
Rozlinda Mohamed ◽  
Nur Suhadah Sani ◽  
Nurjannah Jalal ◽  
...  
Keyword(s):  
Speed Limit ◽  
Operating Speed ◽  
Traffic Conditions

Evaluation of Operating Speed at Multilane Highway Along Jalan Meru: Case Study of Reliability of Posted Speed Limit

InCIEC 2015 ◽  
2016 ◽  
pp. 995-1006 ◽  
Author(s):  
Ab Mughni B. Ab Rahim ◽  
Muhammad Akram Bin Adnan ◽  
S. Z. Zamalik ◽  
F. Jamali ◽  
M. Mohammad ◽  
...  
Keyword(s):  
Speed Limit ◽  
Operating Speed

Evaluation of Expressway Alignment Coordination Based on Operating Speed: A Case Study of Suiyan Expressway

CICTP 2020 ◽  
2020 ◽  
Author(s):  
Shan-Shan Liu ◽  
Jian-Jun Wang ◽  
Xue-Qin Long ◽  
Lian-Cai Zhang
Keyword(s):  
Operating Speed

Black Spot Identification and Audit Analysis for Heterogeneous Traffic Conditions in Hyderabad City � a Case Study

2015 ◽  
Vol 4 (3) ◽  
pp. 34-42
Author(s):  
T. Sri Lakshmi Sowmya ◽  
◽  
A. Ramesh ◽  
B.N.M. Rao ◽  
M. Kumar ◽  
...  
Keyword(s):  
Black Spot ◽  
Heterogeneous Traffic ◽  
Traffic Conditions

scholarly journals Enhancing Freeway Safety through Intervening in Traffic Flow Dynamics Based on Variable Speed Limit Control

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Jinming You ◽  
Shouen Fang ◽  
Lanfang Zhang ◽  
John Taplin ◽  
Jingqiu Guo
Keyword(s):  
Real Time ◽  
Traffic Flow ◽  
New Technologies ◽  
Flow Dynamics ◽  
Crash Risk ◽  
Speed Limit ◽  
Variable Speed ◽  
Variable Speed Limit ◽  
Traffic Conditions ◽  
Safety Research

New technologies and traffic data sources provide great potential to extend advanced strategies in freeway safety research. The High Definition Monitoring System (HDMS) data contribute comprehensive and precise individual vehicle information. This paper proposes an innovative Variable Speed Limit (VSL) based approach to manage crash risks by intervening in traffic flow dynamics on freeways using HDMS data. We first conducted an empirical analysis on real-time crash risk estimation using a binary logistic regression model. Then, intensive microscopic simulations based on AIMSUN were carried out to explore the effects of various intervention strategies with respect to a 3-lane freeway stretch in China. Different speed limits with distinct compliance rates under specified traffic conditions have been simulated. By taking into account the trade-off between safety benefits and delay in travel time, the speed limit strategies were optimized under various traffic conditions and the model with gradient feedback produces more satisfactory performance in controlling real-time crash risks. Last, the results were integrated into lane management strategies. This research can provide new ideas and methods to reveal the freeway crash risk evolution and active traffic management.

An exploration of the interaction between urban human activities and daily traffic conditions: A case study of Toronto, Canada

Cities ◽  
2019 ◽  
Vol 84 ◽  
pp. 8-22 ◽  
Author(s):  
Wei Huang ◽  
Shishuo Xu ◽  
Yingwei Yan ◽  
Alexander Zipf
Keyword(s):  
Human Activities ◽  
Traffic Conditions

scholarly journals Development of driving cycle under real world traffic conditions: A case study

2019 ◽  
Vol 9 (6) ◽  
pp. 4798
Author(s):  
Geetha A. ◽  
Subramani C.
Keyword(s):  
Driving Cycle ◽  
Time Dependent ◽  
Maximum Speed ◽  
Time Data ◽  
Maximum Acceleration ◽  
The Road ◽  
Traffic Conditions ◽  
Condensed Form ◽  
On The Road

<p><span>The modeling of a car is essentially done by taking into consideration the driving terrain, traffic conditions, driver’s behavior and various other factors which may directly or indirectly affect the vehicle’s performance. A vehicle is modeled for given specifications and constraints like maximum speed, maximum acceleration, and braking time, appropriate suspension for the gradient of the road and fuel consumption. Henceforth, a profound study and analysis of different drive cycles are essential. A time dependent drive cycle is a condensed form of data that helps us to determine the time taken to conduct the driving test on the road. This article highlights the development of a real driving cycle in the area of Tamilnadu, India. On-road vehicle’s speeds versus time data were obtained along the selected route. The data obtained were analyzed first and then a new driving cycle was developed.</span></p>

scholarly journals Estimation of the Inhaled Dose of Airborne Pollutants during Commuting: Case Study and Application for the General Population

2020 ◽  
Vol 17 (17) ◽  
pp. 6066
Author(s):  
Francesca Borghi ◽  
Giacomo Fanti ◽  
Andrea Cattaneo ◽  
Davide Campagnolo ◽  
Sabrina Rovelli ◽  
...  
Keyword(s):  
General Population ◽  
Pulmonary Ventilation ◽  
Ventilation Rate ◽  
The Other ◽  
Winter Period ◽  
Airborne Pollutants ◽  
Traffic Conditions ◽  
High Concentrations ◽  
The City

During rush hours, commuters are exposed to high concentrations and peaks of traffic-related air pollutants. The aims of this study were therefore to extend the inhaled dose estimation outcomes from a previous work investigating the inhaled dose of a typical commuter in the city of Milan, Italy, and to extend these results to a wider population. The estimation of the dose of pollutants inhaled by commuters and deposited within the respiratory tract could be useful to help commuters in choosing the modes of transport with the lowest exposure and to increase their awareness regarding this topic. In addition, these results could provide useful information to policy makers, for the creation/improvement of a mobility that takes these results into account. The principal result outcomes from the first part of the project (case study on a typical commuter in the city of Milan) show that during the winter period, the maximum deposited mass values were estimated in the “Other” environments and in “Underground”. During the summer period, the maximum values were estimated in the “Other” and “Walking (high-traffic conditions)” environments. For both summer and winter, the lowest values were estimated in the “Car” and “Walking (low-traffic conditions)” environments. Regarding the second part of the study (the extension of the results to the general population of commuters in the city of Milan), the main results show that the period of permanence in a given micro-environment (ME) has an important influence on the inhaled dose, as well as the pulmonary ventilation rate. In addition to these results, it is of primary importance to report how the inhaled dose of pollutants can be strongly influenced by the time spent in a particular environment, as well as the subject’s pulmonary ventilation rate and pollutant exposure levels. For these reasons, the evaluation of these parameters (pulmonary ventilation rate and permanence time, in addition to the exposure concentration levels) for estimating the inhaled dose is of particular relevance.

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